Abstract:
This report documents the results of applying a previously developed, standardized approach evaluating advanced traveler information systems (ATIS) projects to a much more diverse group intelligent transportation systems (ITS) projects. The evaluation approach used structured interviews investigate technical, management and organizational lessons learned. The approach appeared well with this diverse group of projects. This report also includes the individual evaluation reports for the 16 ITS projects that evaluated. Each report includes a discussion on background information, project description, architecture and standards, system usage and benefits and institutional and technical issues.

Authors:
Briglia,P. M., Kopf,J., Hallenbeck,M. E.

Keywords:
evaluation, intelligent transportation systems, ITS, lessons

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Abstract:
The Washington State Department of Transportation (WSDOT) and its partner agencies developed a research program to design new and retrofit culverts. The goal of this program is to identify culvert bed configurations, designs, and associated hydraulic conditions that allow successful movement of juvenile salmonids upstream, while safely passing water, sediment, and debris downstream. WSDOT, in cooperation with the Washington Department of Fish and Wildlife (WDFW), constructed a culvert test bed at the WDFS's Skookumchuck Hatchery in western Washington State. Battelle conducted experiments to establish protocols for future research on bed conditions, culvert shape, etc. This technical report describes various protocols, such as time of day, duration of test, and density of test fish, and provides hydraulic and biological characterizations of a baseline culvert.

Authors:
Pearson,W. H., Richmond,M., Johnson,G., Sargeant,S. L.

Keywords:
agencies, condition, culvert, culvert passage, culvert test bed, culverts, density, design, developed, evaluation, experimental, fish, ITS, juvenile salmonid, juvenile salmonid passage, program, research, retrofit, salmonids, transportation, Washington, Washington state, wildlife, WSDOT

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/614.1.pdf http://wsdot.wa.gov/Research/Reports/600/614.1.htm

Abstract:
This report documents the results of five Advanced Traveler Information System (ATIS) project evaluations performed for the Washington State Department of Transportation. The projects encompass a range of devices in both urban and rural environments. Guidelines and lessons learned for planning and operating ATIS programs were then developed from the evaluation results. These observations were clustered into common themes in the areas of maintenance, rural projects, project management, staffing, training, support, and customer response. As part of this effort, a standardized evaluation approach for ATIS projects was developed. The approach was designed to focus on technical, management, and organizational lessons learned. The method was effective in producing useful information about ATIS benefits and deployment issues. Using that approach, an additional nineteen required ATIS evaluations will be performed in a second project phase. The additional evaluations will also provide an opportunity to further verify and strengthen the initial lessons learned, as well as to expand the method.

Authors:
Kopf,J., Nee,J., Ishimaru,J. M., Hallenbeck,M. E.

Keywords:
advanced traveler information systems, ATIS, benefit, benefits, environment, evaluation, framework, Intelligent transportation system, ITS, maintenance, management, planning, program, project evaluation, project management, rural, training, transportation, traveler information, urban, Washington, Washington state

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/606.1.pdf http://wsdot.wa.gov/Research/Reports/600/606.1.htm

Abstract:
The goal of advanced traveler information systems (ATIS) is to provide travelers with information that will facilitate their decisions concerning route choice, departure time, trip delay or elimination, and mode of transportation. The benefits of ATIS projects can be evaluated through field studies, simulation software, and surveys. An evaluation method called the ITS Deployment Analysis System (IDAS) is suggested for use by the Washington State Department of Transportation (WSDOT). IDAS is a "sketch" planning tool intended for screening and prioritizing all intelligent transportation systems (ITS) projects (not just ATIS projects). The software evaluates a number of benefits. These are determined by changes attributable to the deployment of ITS in vehicle miles traveled (VMT), vehicle hours traveled (VHT), volume-capacity (v/c) ratios, and vehicle speeds throughout a given network. The IDAS evaluation depends on a number of assumptions that affect the calculations of costs and benefits. The IDAS developers recommend that these assumptions be inspected by local agencies and adjusted to better represent local conditions. The assumptions about the impacts on VMT, VHT, v/c ratios, and vehicle speed are particularly important. Consequently, suggestions are made within this report for adjustments that WSDOT should make to these default values. These values will allow the WSDOT to successfully employ IDAS for ATIS evaluation.

Authors:
Kristof,T., Lowry,M., Rutherford,G. S.

Keywords:
advanced traveler information systems, agencies, analysis, Assessing, ATIS, ATIS benefits, ATIS evaluation, benefit, benefits, condition, cost, costs, Deployment, evaluation, IDAS, impact, impacts, information systems, Intelligent transportation system, intelligent transportation systems, ITS, ITS Deployment Analysis System, planning, prioritizing, project, research, software, speed, Study, survey, Surveys, System, systems, transportation, traveler information, Washington, Washington state, WSDOT

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/597.1.pdf http://wsdot.wa.gov/Research/Reports/500/597.1.htm

Abstract:
The SR99-Spokane Street Over-crossing is located in Seattle, Washington, and was built in the late 1950s. Its construction is mostly of reinforced concrete; the reinforcement detailing is poor by modern seismic standards, particularly with respect to confinement, and the underlying soils are also weak. Furthermore, the structure contains many "outrigger bents", in which columns are displaced from their ideal locations to accommodate passage of railroad tracks beneath the structure. These outrigger bents cause significant asymmetry in the structure that could lead to unusual and undesirable seismic response. In this study, the seismic response of the structure was evaluated analytically and seismic retrofit strategies were developed and evaluated. In a companion experimental study by Washington State University (WSU), the as-existing structure was investigated by testing scale models of representative bents, and one retrofit strategy was also tested. In this report, modeling approaches are discussed in detail, and the results of evaluations of the as-existing structure as well as the retrofit strategies are presented. Some components of the structure (e.g. the deck, the already-jacketed columns and the soil-foundation-structure system) were found to be critical to an accurate determination of response and were therefore modeled in some detail. Site-specific ground motions at three different hazard levels were used. The structure was found to be vulnerable, especially to the 72- and 475-year ground motions. The knee-joints that connect the outrigger beams and columns were found to be the most critical components, and their vulnerability was shown to be influenced by the type of retrofit performed on the outrigger column. Retrofit strategies included some designed to increase the strength and ductility of the components, and some intended to reduce the demands on them.

Authors:
Inouye,B., Lehman,D. E., Stanton,J. F., Kramer,S. L.

Keywords:
columns, concrete, construction, ductility, evaluation, experimental, hazard, ITS, knee-joints, modeling, models, outriggers, reinforced concrete, reinforcement, retrofit, seattle, seismic, seismic response, soil-structure interaction, strength, Washington, Washington state

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/596.1.pdf http://wsdot.wa.gov/Research/Reports/500/596.1.htm

Abstract:
This summary report presents an overview of the level of traveler usage (e.g., how many vehicles use the freeways) and travel performance (e.g., how fast they are traveling, where and how often congestion ocurs) on the principal urban freeways in the central Puget Sound area. The freeways studied in this project are managed by the Washington State Department of Transportation (WSDOT) using its FLOW system, a coordinated network of traffic monitoring, measuring, information dissemination, and control devices that operates on urban state and Interstate highways in the central Puget Sound region. Data presented in this report were collected by the WSDOT's freeway surveillance system. The project that led to this report is intended to meet two separate purposes: 1) to enhance WSDOT's ability to monitor and improve its traffic management efforts on Seattle-area highways, and 2) to provide useful information to the public and decision makers about the status of the freeway system's operational performance. This report is primarily intended to meet the second of these objectives. However, the software developed to assist in freeway data analysis for this project and many of the graphics presented in this report are directly applicable to the first objective.

Authors:
Avery,R. P., Ishimaru,J. M., Nee,J., Hallenbeck,M. E.

Keywords:
analysis, Archived Data User Services (ADUS), congestion, congestion monitoring, control, data, flow, freeway, freeway performance, highway, information dissemination, ITS, management, monitoring, performance, public, research, surveillance, traffic, traffic management, traffic monitoring, transportation, urban, Washington, Washington state, WSDOT

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/563.1.pdf http://wsdot.wa.gov/Research/Reports/500/563.1.htm

Abstract:
The pervasive problem of restoring fish runs to their natal streams is characterized in many regions of Washington by improperly placed culverts. The replacement of these fish migration barriers requires knowledge of design flows: floods for structural safety and migration season high and low flows. High flows block fish passage with velocities that exceed their swimming capabilities. During low flows, the migration barrier is caused by a lack of enough water depth to support the bodies of the fish. The estimation of these fish passage and safety flows in ungaged streams is impeded in eastern Washington due to: the wide range of conditions (5 to 110 inches per year of precipitation); diverse geology and soils; a lack of stream-gaging stations with long-term records; changes in land use; and the seasonal impacts of irrigation diversions and well on the remnant flows. Past efforts to estimate these flows have not been successful. Therefore, the WSU project was undertaken to model the high migration season flow in all of eastern Washington. In addition, WSU established 20 stream-gaging stations on salmon streams along the east side of the Cascade Mountains plus the Blue Mountains. Our complementary project was developed to estimate other design flows in the Water Resource Inventory Areas and 49, in which the WSU gage sites are located. United States Geological Survey (USGS) gage records in those (and in and 47) were used to develop our models that estimate the following statistical flows: 100-year, 25-year and 2-year daily and peak floods; the average annual flow and its variability; ranges of mean monthly flows (maximum, average and low); the 7-day average, 2-year, 10-year, 20-year low flow; and the 30- and 60-day average low flows. The model results are, for the most part, very good. The standard error of estimate ranges are: for floods, 2 -37%; average annual flow, 10-37%; maximum annual flow, 6 -14%; annual flow, 13 -23%; and flows, 3 -22%. Monthly average flows reflected the strong influences of seasonal variability and irrigation withdrawals: due to winter frozen Iowa flows (3%)in the Entiat,-Wenatchee Region, and August low flows (242%) in the Blue Mountains due to irrigation. All flow estimation equations were based on USGS stream-gaging data from continuous located in the located in the WRIA'S.

Authors:
Orsborn,J. F., Orsborn,M. T.

Keywords:
Annual, barrier, barriers, condition, culvert, culverts, data, design, design flows, developed, equations, Error, fish, fish passage, flood, flow, hydrologic models, impact, impacts, ITS, land use, land-use, model, models, project, safety, salmon, season, seasonal, soil, structural safety, survey, velocity, Washington, winter

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/545.2.pdf http://wsdot.wa.gov/Research/Reports/500/545.2.htm

Abstract:
This report documents the findings of the evaluation of the North Seattle Advanced Traffic Management System (NSATMS) Project. The evaluation was originally designed to analyze the potential transportation benefits and costs of a regional arterial traffic data sharing system that would obtain traffic signal system information (volumes, signal timing plans, etc.) from participating agencies and then share the data among those agencies. The operational goal was to allow each agency to make better control decisions by providing it with real-time knowledge of traffic conditions outside of its own control system boundaries. Because of a series of technical and project management issues, the system as originally envisioned was not successfully implemented. As a result, this evaluation does not include an analysis of direct operational benefits. It does, however, include a discussion of the expected institutional benefits, as well as an extensive "lessons learned" section based on the project team's review of the NSATMS effort. Of particular note were the importance of effective and ongoing lines of project communication, and the critical need to properly evaluate the fundamental nature of the project and provide a well-matched project management structure. The lessons learned from this project provide instructive guidelines for those who are contemplating future ITS system development efforts of comparable scope and complexity. Despite the limited successes of the NSATMS effort, the evaluation team found continued support for the regional arterial ATMS concept within the Puget Sound region. Follow-on research that contributes to a better understanding of the benefits, costs, and technical requirements of an arterial traffic management system is desired by many of the project participants.

Authors:
Ishimaru,J. M., Hallenbeck,M. E.

Keywords:
intelligent transportation systems, advanced traffic management systems, arterial signal control systems, traffic control strategies, Archived Data User Services (ADUS), data sharing, evaluation, seattle, advanced traffic management systems, traffic, traffic management, management, management system, transportation, transportation benefit, benefits, benefit, costs, cost, arterial, traffic data, data, volume, control, condition, ITS, project management, analysis, line, development, ATMS, research

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External Links: http://www.wsdot.wa.gov/research/reports/fullreports/555.1.pdf http://wsdot.wa.gov/Research/Reports/500/555.1.htm

Abstract:
The SWIFT (Seattle Wide-area for Travelers) project was a field operational test of a wide area ITS communications system using a flexible FM sub-carrier High Speed Data System (HSDS). The test was conducted in a partnership with WSDOT, King County Metro Transit, Delco Electronics, Inc., IBM, Seiko Communications Systems, Metro Traffic Control and the Federal Highway Administration. Three devices were used, by the public, to receive the traveler a Delco car radio (capable of providing vector navigation in addition to personal paging and the messages); a Seiko wrist watch pager; and a portable computer (capable of providing graphic displays of traffic advisories and bus positions). After the 15-month test, interviews with the 600 Seattle commuters/participants were conducted to assess user acceptance. A communications study evaluated the adequacy of the HSDS system to disseminate traveler information. Architecture study assessed the effectiveness of the various components to carry out SWIFT operations. institutional issues study documented the history of the project and assessed the institutional issues confronted. A deployment cost study investigated the cost of deployment of a SWIFT system and assessment of potential profitability. The first five reports in this series detail individual aspects of the project.

Authors:
Wetherby,B., Perez,W.

Keywords:
Acceptance, Assessment, bus, computer, control, cost, counties, data, Deployment, effectiveness, evaluation, highway, Institutional, interviews, Issues, ITS, Miscellaneous Library, paging, portable computer, project, public, seattle, speed, Study, SWIFT, System, systems, traffic, traffic advisories, traffic control, transit, traveler information, WSDOT

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Abstract:
Recently, WSDOT acquired a non-nuclear, non-destructive, density measuring device manufactured by TransTech called a Pavement Quality Indicator (PQI). TransTech's PQI measures pavement density indirectly by measuring its dielectric constant. A non-nuclear gauge is advantageous because it contains no radioactive source and is therefore not subject to radiological controls, and it can obtain readings in about 5 seconds versus to 4 minutes with a nuclear gauge. Currently, TransTech is collecting data from different agencies to determine the suitability for measuring asphalt pavement density. This brief study presents density measurements from PQI and compares them with nuclear density gauge and core density measurements from three WSDOT 1998 paving projects. This evaluation was a secondary study to 1998 study Asphalt Concrete Temperature in Washington State; therefore this study's experimental design was based entirely on the Temperature study requirements, which resulted in non-random samples and multiple populations within the same sample groups. Despite these problems, results indicate that, when averaged, PQI readings compare favorably with both nuclear measurements and core measurements.

Authors:
Muench,S. T., Mahoney,J. P., Cawley,B.

Keywords:
agencies, asphalt, asphalt concrete, asphalt pavement, concrete, control, core densities, data, density, design, evaluation, experimental, group, indicator, ITS, nuclear gauge, pavement, pavement quality, pavement quality indicator, population, project, quality, Study, temperature, Washington, Washington state, WSDOT

Abstract:
Increasingly, transportation professionals are using technology, known as Intelligent Transportation Systems (ITS), to address transportation problems. This paper investigates the potential applications of ITS to safety issues on rural roadways in Washington. The most frequent type of rural crashes and their casual factors are identified from the state's Collision Report Form. The ability of ITS applications to reduce these types of crashes is then discussed.In Washington State, the factors that contribute most to rural crashes is human behavior. Some ITS applications, such as speed warning systems, may be good solutions at known hazardous locations. However, most human behavioral issues, such as inattention or poor driver judgment, cannot be directly addressed by ITS application that are currently available.In Washington, crashes due to some aspect of the roadside environment involved about one third of the vehicles. ITS offer a viable alternative to traditional engineering solutions for a number of these types of crashes by informing drivers about roadside hazards. ITS weather systems and traveler information systems in general, can indirectly improve rural safety by providing information about travel and roadway conditions. Rural intersections, work zones, and railroad crossings are other potentially hazardous areas where ITS may be useful.The final factor that contributes to a small percentage of rural crashes is the vehicle and- ITS applications may help indirectly by making trucks more compliant with safety laws and by improving the efficiency of safety inspections.ITS emergency notification systems also offer some safety benefits by mitigating some of the consequences of rural crashes.For the WSDOT, a handful of ITS safety applications have been well enough tested that they can be aggressively used as tools to reduce rural crashes. However, many more ITS safety applications, although promising, still need to be fully documented and would be best applied in this state as a demonstration of future potential. Most of these applications would warn drivers about road and roadside hazards. The greatest benefit from ITS for rural safety may come from future applications that will address rural crashes caused by human behavior. These applications will evolve from a number of the large federal research projects that are under way and are still a number of years away from providing benefits on a wide scale. Given their potential impact on rural safety, WSDOT should monitor these projects closely.

Authors:
McCormack,E. D., Legg,B.

Keywords:
rural accidents, rural travel, rural safety, ITS, Washington state, research

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Abstract:
This report examines the relationship between Intelligent Transportation Systems (ITS) and safety from an urban perspective.Existing urban ITS systems are either system-level or site-level applications. System-level ITS, such as freeway management systems or traffic signal networks, address safety concerns only indirectly. These systems are designed to improve traffic flows and thus indirectly reduce collisions caused by congestion. Other system-level ITS used to increase the efficiency of transit, commercial vehicle, and emergency service operations also benefit safety indirectly. Site-level ITS applications, such as railroad/highway crossing warnings or work zone systems, are installed to directly address safety concerns. However, these applications are limited to specific locations identified as hazardous.Most urban crashes in Washington involve multiple vehicle collisions caused by driver error at locations that have not been identified as hazardous. Future ITS systems known collision avoidance systems (CAS) hold considerable promise for urban roadway safety because these in-vehicle devices will inform drivers of judgment errors and can do so at many locations along an urban roadway system.A handful of ITS applications are so well tested that they can be aggressively pursued by WSDOT as tools to reduce urban crashes. Most of these applications include the various systems, such a ramp meters and incident detection, used for freeway management. Other ITS safety applications, while promising, still need to be fully documented and are best used as demonstration applications. Most of these applications involve sensor technology used to warn drivers about road and roadside hazards at specific sites. The greatest safety benefit from ITS may come from in-vehicle collision warning systems. These applications should evolve from a number of large federal research projects and private industry initiatives that are under way. Given their potential impact on safety, WSDOT should monitor applications of these projects.

Authors:
McCormack,E. D., Legg,B.

Keywords:
roadway safety, ITS, urban, Washington state, research

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Abstract:
Funded by the 1987 Intermodal Surface Transportation Efficiency Act, the Strategic Highway Research Program (SHRP), was a five year, $150 million research program to improve the performance of the nation's roads by addressing four key areas: concrete and structures; highway safety and maintenance; asphalt; and long-term pavement performance. Nearly one-third of the $150 million was allocated for the study of asphalt, specifically to develop performance based specifications that would relate material properties of the binder and the mix to field performance. Superpave (Superior PERforming asphalt PAVEments) encompasses the products of the SHRP asphalt research program and consists of three interrelated elements: an asphalt binder specification with supporting tests; a mix design and analysis system with supporting tests; and performance prediction models. This report is a compilation and synthesis of Washington DOT's (WSDOT) experience with selected components and concepts of the SHRP/Superpave technology to include the following: performance graded (PG) binder usage and specification validation; gyratory mix design; the Superpave Shear Test (SST); and field performance of the Superpave mixes.Binders typically specified by WSDOT (AR400OW and PBAs -2, -5, -6. -6GR) were classified in terms of five Superpave performance grades: PG 58-22; 64-22; 64-28; 64-34; and 70-28. Although data from 171 weather stations suggest that as many as 6 low- and 5 high-temperature grades could be specified, binder availability and regional pavement distress were used to develop guidelines for statewide PG usage. Three binders were recommended for use in the western, northeastern and southeastern regions of the state as follows: PG 58-22; PG 58-34; and PG 64-28, respectively. Validation of the binder specification with respect to low temperature cracking was accomplished using binder and field performance data from 28 projects. The results were very encouraging: the original SHRP algorithm for binder selection correctly "predicted" field performance in 22 of 28 cases, whereas the LTPP algorithm for binder selection correctly "predicted" field performance in 26 of 28 cases.Additionally, a laboratory experiment using the Superpave Shear Test (SST) apparatus was undertaken to test the effectiveness of binder "bumping," i.e., increasing the high temperature grade because of exceptionally high traffic volume and/or slow or standing traffic. The data clearly indicate that the SST is an effective tool for discriminating between binders and that 'bumping" may be effective in reducing pavement rutting. Permanent shear strain for specimens made with a PB 70-xx binder was only 25 to 33% of the shear strain for specimens made with a PG 58-xx binder.As originally configured, the Superpave mix design matrix included seven traffic levels and four temperature regimes for 28 possible compaction levels. Recognizing that the 28 compaction levels made for a somewhat unwieldy system, WSDOT attempted to reduce the number of compaction levels by conducting a series of mix designs at each compaction level. The results of the limited experiment suggest that it might be possible to limit the number of compaction levels required for mix design. Research by Brown et. al. (NCHRP 99) tends to confirm this as they have suggested reducing the number of compaction levels and provided more definitive guidance with respect to each level.Since 1993 WSDOT has place 44 projects which include some component of the Superp ave technology. For 17 of these projects parallel Hveem and Superpave mix designs were conducted. In 13 of the 17 cases, the Superpave design asphalt content was equal to or greater than the Hveem design asphalt content, though the difference was usually no more than 0.2%. A fundamental difference between Hveem and Superpave mix design methods is the compaction device. Data from these field projects indicate that the current kneading and gyratory compaction protocols (at least for 109 gyrations) yield similar air void contents.As noted previously, Washington DOT has placed 44 projects which involve some component of the Superpave technology. For 18 of the projects a conventional Hveem mix design was conducted using a PG binder (Hveem-PG). The remaining 26 projects were truly Superpave, i.e., the materials selection and mix design were established in accordance with the Asphalt Institute's SP2, Superpave Level 1 Mix Design. According to WSDOT practice the following numerical indices trigger maintenance: Pavement Structural Condition (PSC) 10 mm; or International Roughness Index (IRI) > 500 cnVkm. Although relatively "young", the 44 projects are performing quite well. The average values of rutting, PSC, and IRI (4, 91, and 121, respectively) are all well below the "trigger" values. With respect to rutting and PSC, the performance of Hveem-PG and Superpave projects is virtually identical. However, the ride quality of the Superpave projects is a bit rougher than the Hveem-PG binder projects: IRI of 134 for the former and 103 for the latter. The higher values of IRI measured on the Superpave projects may be the result of the typically coarser aggregate gradation or differences in construction techniques.WSDOT's Superpave experience has not been without challenges. Still, its overall experience has been very encouraging. Experimentation with the revised compaction matrix, continued use of the SST, field validation of the "bumping" experiment, and long-term monitoring of field performance will provide the necessary data to allow WSDOTs critical assessment of Superpave's technical merit and economic viability.

Authors:
Leahy,R. B., Briggs,R. N.

Keywords:
SHRP, Superpave, asphalt, intermodal, transportation, transportation efficiency, highway, research, program, performance, concrete, structures, highway safety, safety, maintenance, pavement, specifications, specification, asphalt pavement, pavements, tests, design, analysis, prediction, models, Washington, WSDOT, data, temperature, cracking, LTPP, traffic, volume, compaction, materials, condition, international roughness index, roughness, index, ride quality, quality, aggregate, construction, ITS, monitoring

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Abstract:
The Seattle Wide-area Information for Travelers (SWIFT) project was a highly successful Intelligent Transportation System (ITS) Field Operational Test (FOT) that was conducted over a four-year period from 1993 to 1997. The purpose of the project was to test the efficacy of a High Speed Data System (HSDS), or FM Sub-carrier, to disseminate incident, bus and speed congestion information via three different end-user devices: pager watch, portable computer and in-vehicle navigation device. Six hundred ninety (690) commuters, many with route- or mode-choice options, participated in the FOT and provided user-acceptance evaluations. Other evaluation components examined the system architecture, communications coverage, deployment cost and institutional issues that affected the project.The primary purpose of the SWIFT Institutional Issues Study evaluation was to collect information regarding the institutional issues (e.g., policies, jurisdictional issues, internal and external factors) that affected design, development, testing, deployment and conduct of the SWIFT Field Operational Test (FOT); determine how these issues were overcome and what lessons could be learned. A secondary purpose of the evaluation was to document the history of the SWIFT project.The methodology for the SWIFT Institutional Issues Study consisted of two sets of questionnairesand two sets of semi-structured interviews that were conducted with fourteen (14) SWIFT team memberrepresentatives at two different points during the conduct of the SWIFT FOT: about midway through the conduct of the test and after the test was completed. All SWIFT team member responses were independently collected and SWIFT institutional issues were primarily identified by determining which topics were addressed by two or more individuals. Historical information was collected from various sources throughout the project.SWIFT represents one of the first ATIS FOTs conducted in this country. Earlier tests were conducted in Orlando, FL (TravTek) and Minneapolis St. Paul (Genesis) among others, yet the SWIFT FOT appears to have extended considerably the available database of information regarding ATIS effectiveness and acceptance. The addition of real-time bus information, in particular, has set the SWIFT FOT apart from others already conducted.One of the significant aspects of the SWIFT teaming agreement was the long-term interest in ITS and commitment of the organizations involved. For instance, the majority of the SWIFT team members articulated a long-term interest in ITS deployments. In addition, three organizations-Seiko, Etak and Metro Traffic Control-+ommitted themselves to fielding a \"SWIFT-like\" system after the project was completed. This degree of interest and commitment resulted in all of the SWIFT team members working together in a very effective, cooperative fashion throughout the FOT.A critical organizational structure that was instituted to implement SWIFT was the weeklyteleconference. This simple, yet cost-effective method of managing and discussing the technicalissues involved with the project was attributed by many of the SWIFT team members to aprimary instrument of the project\'s success. In particular, the SWIFT teleconferences enabledthe representatives of each organization to keep abreast of the developmental status of theproject, to brainstorm solutions to encountered problems and to develop scheduling sense.

Authors:
Wetherby,B.

Keywords:
ATIS, bus, computer, congestion, congestion information, cost, data, database, design, development, effectiveness, evaluation, incident, Institutional, Intelligent transportation system, interviews, Issues, ITS, methodology, mode choice, policy, portable computer, project, scheduling, seattle, speed, SWIFT, System, tests, traffic, transportation

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Abstract:
The Seattle Wide-area Information For Travelers (SWIFT) project was a highly successful Intelligent Transportation System (ITS) Field Operational Test (FOT) that was conducted over a four-year period from 1993 to 1997. The purpose of the project was to test the efficacy of a High Speed Data System (HSDS), or FM Sub-carrier, to disseminate incident, bus and speedlcongestion information via three different end-user devices: pager watch, portable computer and in-vehicle navigation device. Six hundred ninety (690) commuters, many with route- or mode-choice options, participated in the FOT and provided user-acceptance evaluations. Other evaluation components examined the system architecture, communications coverage, institutional issues, and consumer acceptance. The primary purpose of the SWIFT Deployment Cost Study was to provide an independent Life Cycle Cost Estimate (LCCE) of an operational and fully deployed SWIFT system. Moreover, it is intended to provide both the SWIFT participants and the FHWA with a measure of the commercial viability of \"SWIFT-like\" systems nationwide. Table ES- 1 shows the organizations that were included in the SWIFT Deployment Cost Study LCCE and commercial viability analysis.Table ES-1. Deployed SWIFT Participants (CostIRevenue Participants).Industry Government/InstitutionaISeiko Communications Systems, Inc. (SCS) King CountyMetro Networks University of WashingtonEtak, Inc.IBM (FOT Development Only)Delco Electronics (FOT Development Only)The methodology for the SWlFT Deployment Cost Study LCCE relied on standard proven costestimation and data collection and analysis techniques to provide cost estimates for each SWIFTparticipant shown above across the following three life-cycle phases:1) FOT development (costs of current SWIFT Test)King County Metro TransitUniversity of Washington (UW)2) Commercial Development (additional development and procurement costs for fullydeploying an operational SWIFT system (follows the completion of the SWIFT test)3) Annual Commercial Operations (annual operations costs for a fully deployed SWIFTsystem)A summary of the resulting life cycle cost estimate (LCCE) for the deployed SWIFT system ispresented in Table ES-2. Here, the FOT Development phase (based on SWIFT test actuals) wasestimated to cost $6.4 Million, the Commercial Development phase was estimated to cost $1.5Million, and the Annual Commercial Operations costs were estimated to be $0.8 Million.-- -SWIFT Deployment Cost Study I

Authors:
Jensen,M.

Keywords:
Acceptance, analysis, Annual, bus, computer, Consumer, cost, costs, counties, data, data collection, Deployment, development, evaluation, incident, Institutional, Intelligent transportation system, Issues, ITS, methodology, Miscellaneous Library, mode choice, networks, portable computer, project, seattle, speed, Study, SWIFT, System, systems, transportation, Washington

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Abstract:
This report documents the moldeling strategy and associated verification which permits analysis of multiple PCC plain jointed slabs. Several subbase/soil layers below the slabs and separation of the slab and base layer are considered. Load effects include those associated with both multiple tire and linear temperature gradients. A technique for modeling aggregate interlock shear transfer across PCC pavement joints is developed and verified. The overall development is contained in the computer program EverFE. The computer program uses a graphical user interface which aids its use.

Authors:
Davids,W. G., Turkiyyah,G. M., Mahoney,J. P.

Keywords:
aggregate, aggregate interlock, analysis, base, computer, computer program, developed, development, EverFE, finite element, Finite elements, ITS, Joints, joints load transfer, modeling, pavement, pavements, PCC, permits, program, rigid pavement, temperature, tire

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Abstract:
The major objectives of this study were to examine: (1) the types of recycled materials that are appropriate and feasible as alternative paving materials such as glass and tires; and (2) the types of recycled materials, such as mixed-plastics and compost, that can be utilized in all types of transportation applications other than pavements. Seven key products are investigated: tires; glass; asphalt concrete fly ash; compost; mixed plastics; and sign stock. Performance and cost data for pavements is documented for both in-state and nationwide applications. The national experience \'with the use of waste glass as an additive to asphalt concrete and its use in unbound base material is so highlighted. Programs for experimental use of recycled material are outlined. Recommendations for staffing and program changes to deal with recycling are also discussed.

Authors:
Swearigen,D. L., Jackson,N. C.

Keywords:
additive, Alternative, applications, asphalt, asphalt concrete, base, base materials, concrete, construction, cost, data, experimental, fly ash, Glasphalt, highway, highway construction, ITS, materials, objectives, pavement, pavements, performance, program, recycled ACP, recycling, Rubber-asphalt, tire, tires, transportation

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Abstract:
This final report demonstrates the feasibility of employing high molecular weight/high density polyethylene cylinders as the energy dissipating medium in highway safety appurtenances. It is shown that this polymer can dissipate large amounts of kinetic energy, undergo large deformations and strains without fracturing, and essentially restore itself to its original size, shape, and energy dissipation potential when the forcing function is removed.This research involves a quasi-static and impact loading experimentalinvestigation to determine the energy dissipation characteristics of HMW HDPEtubes as functions of temperature, radius to wall thickness ratio, strain,strain-rate, deformation, and repeated and cyclic loading. The results ofthis experimental program are analyzed to develop analytic energy dissipationexpressions which are then employed in the design of truck mountedattenuators (TMA), Finally, an expert system computer program, CADS, ismodified to use HMW HDPE tubes in the generalized design of crash cushions.The potential financial, legal, and safety payoffs for highway operationsassociated with developing highway safety devices which are essentiallymaintenance free are significant. Maintenance costs associated with therepair of impacted safety devices would be greatly reduced or eliminated.Tort liability exposure related to damaged or collapsed hardware would besignificantly decreased. Finally, the safety of the motoring public and themaintenance personnel involved in maintaining and repairing damaged hardwarewould be enhanced.

Authors:
Carney III,J. F.

Keywords:
computer, computer program, cost, costs, cyclic loading, density, design, development, Energy, experimental, expert system, exposure, highway, highway safety, impact, impact attenuation devices, ITS, maintenance, maintenance free, polyethylene, polymer, program, public, research, reusable, safety, self-restoration, strains, temperature, truck

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Abstract:
Bridge expansion joints pose a special problem in the Washington State Department of Transportation (WSDOT) bridge deck management system. These devices are subject to repeated heavy dynamic loading, and premature failure has occurred in many cases. It is WSDOT policy, as part of the Bridge Deck Management System, to make expansion joints watertight in order to reduce the potential of substructure corrosion induced by roadway deicing salts and other contaminants.Expansion joint seals play an important role in keeping expansion joints watertight. A relatively new material, Evazote 50, looks promising in its performance characteristics as an expansion joint seal. It is able to accommodate considerable joint movement, its durability and corrosion resistant properties are excellent, and it is resistant to absorption of oils and greases. The purpose of this experimental project is to gain knowledge about the material\'s effectiveness over time and to gain knowledge about field installation techniques. It was very beneficial to have the manufacturer\'s representative on the job during installation. This was required by special provision and is a practice that should be continued on future projects.In-place performance will determine acceptance of Evazote 50 for general use.

Authors:
Roper,T. H., Henley,E. H. Jr

Keywords:
absorption, bridge, bridge deck, bridge deck rehabilitation, corrosion, Deck, durability, effectiveness, expansion joints, experimental, in-place, ITS, Joints, management, management system, performance, policy, roadway, salt, transportation, Washington, Washington state, WSDOT

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Abstract:
This study compares the results of four asphalt extraction methods; the Quick (WSDOT 711), the Vacuum (AASHTO T-164 Method E-11), the Centrifuge (AASHTO T-164 Method A), and the Reflux (AASHTO T-164 Method D).The methods are compared on the basis of the amounts of trichloroethane used, the exposure to trichloroethane while testing, the time needed to do the testing, and the accuracy of the asphalt content and aggregate gradation determinations (with the Reflux method serving as the standard of comparison). It was concluded that the Quick method was the best alternative to the method, based primarily on the speed of the test and its close agreement with the method on asphalt content and percent passing the sieve. All methods provided exposure to trichloroethane vapor below the recommended allowable levels.

Authors:
Schultz,R. L.

Keywords:
aggregate, Alternative, asphalt, Asphalt content, exposure, Extraction, gradation, ITS, speed, Trichoroethane, WSDOT

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Abstract:
As part of the pooled fund research project, the Washington State Department of Transportation was selected to field-test approximately 100 tons of Calcium Magnesium Acetate (CMA) to evaluate its potential as a deicing chemical with direct comparison to salt (Sodium Chloride) and Urea. Evaluation included all aspects of storage, handling, use, and performance. CMA was applied whenever necessary at each test site, using the same application rates as presently used for salt. Typical equipment consisted of front dump trucks with the spinner ahead of the rear axle, and rear discharge hopper trucks. All equipment was used without modification.The use of CMA at the beginning of a storm reduced the amount of bonding of snow to the roadway surface. This effect of keeping the roadway surface bare for longer periods of time reduced the cost of snow fighting. This was accomplished with chemical application rate of 125 Ibs. per lane mile.The addition of sand to CMA reduced the problems of dust, caking and uneven distribution. The sand provided moisture and weight to the application resulting in a smoother, more even distribution. CMA spread above was excessively dusty creating problems in the spreading and distribution. CMA is slower to react on compact snow and ice than salt or Urea. This delay in reaction time was not considered a handicap in the overall snow fighting procedure.The conclusion was that CMA shows promise as a deicing-melting chemical. The problems of dust, light-weight and brittleness need further work and may be significantly alleviated by development of a hydrated compound.

Authors:
Ernst,D. D.

Keywords:
Alternative, axle, chloride, cost, Deicing (CMA Research), development, evaluation, field test, ITS, lightweight, performance, research, roadway, salt, snow, transportation, truck, trucks, Washington, Washington state, weight

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Abstract:
This Post Construction Report provides an overview of the selection of a chemical sealer and its use as a method of protecting the girders and piles of the Nasell River Bridge from the intrusion of chloride ions. The structure treated is located in a marine environment. Chem-Trete Silane sealer was used for this structure and applied as specified by the manufacture. After 1 1/2 years exposure to a salt environment no deteriation of the concrete has been detected. Monitoring of the structure will continue under Washinton State Department of Transportation\'s Bridge Inspection program.

Authors:
Toney,C. A.

Keywords:
bridge, chloride, concrete, concrete sealer, construction, corrosion, deterioration, environment, exposure, inspection, ITS, marine, monitoring, piles, program, salt, seal coat waterproofing, sealer, transportation

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Abstract:
This report is designed to provide information to guide inspectors of wood highway structures in the use of stress wave inspection technology. It explains the methods and instruments used to measure the velocity of stress waves (sound) in wood. The characteristic behavior of sound waves in wood of various species, moisture content, preservative treatment and infection by wood destroying organisms is described. The important effects of the anatomy of wood and the orientation of grain and annual rings to the wave path are discussed to aid in the interpretation of measurements. Characteristics of the instrumentation essential to its calibration are explained and instruction is provided in the appropriate use of these tools. This report has been written to serve as a manual for \"on site \" stress wave inspection of the kind of wood structures found in highway systems. It is a compendium or experience in the field inspection of many wood buildings and highway bridges. Original research conducted to fill in voids in the published studies, is described in the Appendices.

Authors:
Hoyle,R. J. Jr, Rutherford,G. S.

Keywords:
behavior, bridge, bridges, calibration, grain, highway, insect damage, inspection, ITS, manual, nondestructive testing, research, sound waves, Stress waves, stresses, structures, systems, technology, termite damage, velocity, wood decay

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Abstract:
This report describes the feasibility, costs and benefits of automating the vessel and crew scheduling functions of the Marine Division of the Washington State Department of Transportation. The project examined the needs of the Marine Division, reviewed its current procedures, and compared available commercial and public domain software packages. Some existing packages intended for use by the transit and airline industries offer promise, but all the packages examined require considerable modification to meet the needs of the Marine Division.

Authors:
Hallenbeck,M. E.

Keywords:
analysis, automated toll collection, automated vehicle identification, AVI, benefit, benefits, billing, cost, costs, crew scheduling, data, ferry, ferry system, ITS, marine, public, scheduling, scheduling systems, software, systems, transit, transportation, vessel, Washington, Washington state

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Abstract:
The Washington State Department of Transportation (WSDOT) has completed construction of twenty-four hot-mix recycle projects as of January, 1985. At the begining of this study there were sixteen completed projects that were to be examined. Evaluation of the laboratory and pavement performance data shows that WSDOT\'s initial two projects, Renslow to Ryegrass (1977) and Yakima River to West Ellensburg Interchange (1978), are still performing very we1l. Although the other fourteed projects have been constructed only within the last two and a half years, the early data indicates equally promising results. Because of the impressive pavement performance exhibited by the recycled pavements, together with hot-mix recycle benefits such as conservation of natural resources, feasibility of construction, and its cost advantage over new ACP, hot-mix recycling has become an attractive addition to the WSDOT paving program.

Authors:
Peters,A. J., Gietz,R. H., Walter,J. P.

Keywords:
asphalt, asphalt concrete, benefit, benefits, construction, cost, data, evaluation, ITS, pavement, pavement performance, pavements, performance, program, project, recycling, rejuvenating agents, Study, transportation, Washington, Washington state, WSDOT

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Abstract:
This report present the final form of the Washington State Highway runoff pollutant loading model, incorporating data from the five years of study. It also features a probabilistic analysis of concentration and loading data designed to express the chance of exceeding specific values in a given case. Other topics include further assessment of the toxicity of highway runoff and its causes and mitigation.

Authors:
Little,M. L., Horner,R. R., Mar,B. W.

Keywords:
analysis, Assessment, data, highway, highway runoff, ITS, mitigation, model, pollutant loading, runoff, stormwater, Toxicity, Washington, Washington state

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Abstract:
This report examines major issues, concepts and methods of bus transit performance evaluation and suggests procedures and guidelines for internal and external monitoring in Washington State. In support of suggested procedures, data analysis on six years of operational and financial characteristics of Washington State systems, 1979-80 Section 15 data, and collected samples of small community/rural systems from other states was conducted. The major objective of the analysis was to test methodologies for developing and assessing transit peer groups\" relative to size and scale of operations, and prior to comparative within-group evaluation. The methodology entailed employing cluster analysis using up to 10 variables depicting service design and distribution. Two key variables were population and line miles. Problems were encountered in using Section 15 data. Due to its use of urban area, as opposed to service area population, clear distinctions of operating environments could not be determined. Thus, cluster groupings using Section 15 data were inconclusive. Cluster State systems (1980) were satisfactory and following additional verification, a suggested \"peer group\" classification for Washington State was recommended. The seven group types ranged in size from a rural regional (<40,000 population) to metropolitan (<1,000,00 population). Values for 8 efficiency and effectiveness indicators were used to assess \"peer group\" trends in performance in Washington over a five-year period (1976-80). Comparative evaluations of individual systems were not made. Despite only partial success in determining \"peer groups\", the study does identify methods and procedures for assisting in external and internal performance evaluation.

Authors:
Kelly,W. J., Rutherford,G. S.

Keywords:
peer group evaluation, analysis, bus, bus transit, cluster analysis, data, data collection, design, effectiveness, efficiency, environment, evaluation, group, indicator, indicators, Issues, ITS, line, methodology, methods, monitoring, Operating, performance, performance evaluation, performance measures, performance standards, population, rural, section 15 data, Study, System, systems, transit, urban, Washington, Washington state

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Abstract:
The objective of this report is to develop an effective transportation resource allocation technique that is flexible and can be applied to various areas. Allocation procedures were developed and tested for apportioning resources to transportation services in relation to community transportation objectives. Procedures were developed and applied that measured the effectiveness of candidate transportation service proposals in terms of a transportation resource allocation index (TRAI). The extent to which a transportation proposal achieves the community objectives is defined as its effectiveness. The transportation index was computed on the basis of the projects scorings for eight selected determinants, multiplied by the weighing assigned to each determinant in accordance with their relative effectiveness.The TRAI for eight transportation service proposals including transit, were computed as a pilot study and as a working test of the techniques in the Tri-Cities area of Richland, Kennewick, and Pasco, WA. There appears to be no complication in implementing this technique for allocations in any local urban area providing the concepts are correctly evaluated and applied.

Authors:
Nielsen,Robert S., Shea,Daniel J., Yandon,Keith E.

Keywords:
Allocation of resources, developed, development, effectiveness, evaluation, index, ITS, Objective and goals, objectives, project, transit, transportation, transportation resource/allocation, transportation service, urban

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Abstract:
The Central Avalanche Hazard Forecasting project has been funded by the Washington State Highway Commission since July 1975 in order to test the feasibility and effectiveness of central avalanche forecasting for the Cascade Mountain Passes and adjacent territory . Historically, avalanche forecasting in the Cascade Mountains has been done locally on an area-by-area basis by Highway Department personnel and by Forest Rangers and professional ski patrolmen at individual ski areas. This project explored the possibilities of improving both mountain weather and related avalanche forecasts for use by WSDOT during winter operations in the mountain passes and, secondarily, explored the usefulness of anarea-wide forecasting service to other, cooperating agencies. The aim of this work has been to establish the technical and administrative framework for an operational, on-going mountain weather and avalanche forecasting service for Western Washington under the joint support of interested public agencies. This aim has been achieved in autumn 1978 by the operation of an avalanche forecasting office administered by the US Forest Service, housed by the National Weather Service, and supported by WSDT, with additional peripheral support from both the public and private sectors. Previous reports published by the project include: Interim Report, June 1976 (Report No. 23.2); Final Report, June 1977 (Report No. 23.3)Implementation Report, December 1978, which will be published in Spring 1979If you would like to obtain copies of any of these reports, contact WSDOT Public Transportation and Planning Division in Olympia (SCAN 234-61 49) or the Avalanche Research Office on SCAN 323-7180 or Write Avalanche Research,Department of Atmospheric Sciences AK-40, University of Washington, Seattle,Phil Taylor, Research Engineer, has done an outstanding job of developing much of this equipment and devising methods of operation. He is, unfortunately, no longer with the University. He will be working in Autumn 1978 with the US Forest Service as a consultant in addition to his continuing work with the US Geological Survey. This Operating Manual is intended to be an informational document with limited distribution and its format reflects that informality.

Authors:
University of Washington

Keywords:
agencies, avalanche, avalanche forecasting, developed, effectiveness, equipment, forecasting, framework, hazard, highway, Interim, ITS, manual, methods, Operating, planning, project, public, research, survey, transportation, Washington, Washington state, winter

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Abstract:
The purpose of this study is to produce guidelines that will provide assistance to those responsible for the planning and implementation of community involvement plans. These guidelines cover the many elements of a multi-faced community involvement approach and give direction for planning and implementation of these guidelines.A considerable amount of recent experience and information on community involvement was compiled and analyzed to afford the capability of tailoring a community involvement plan for an individual plan for an individual and unique community as defined by its characteristics. Among the major elements discussed are the general principals which must be followed to achieve successful community involvement; the criteria to determine how extensive an involvement plan should be for a particular community as defined by the characteristics of the community and type of proposed action; the establishment of an implementation schedule; detailed discussion of the methods used to disseminate information and obtain citizen input; a description of the various types of community groups which can be used for cooperative planning; recommendations to improve the effectiveness of public meetings; and the basic strategy used in evaluating the success of a community involvement plan.

Authors:
Social and Econonomic Planning Section of the WA State Department of Highways

Keywords:
Community Involvement, Citizen Participation, Citizen Input, Dissemination of Information, Cooperative Planning, Multi-faceted, Scheduling and Implementation, criteria, development, effectiveness, group, ITS, Meeting, methods, planning, program, public

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Abstract:
In the of Washington interdisciplinary teams have been formed for planning projects a major social, economic or environmental impact. The responsibilities of the teams are as follows: Conduct in-depth studies; and implement a community involvement program; and (3) Develop a departmental recommendation for solutions to transportation problems. The inter-disciplinary teams that have used have had a wide variety disciplines represented, purpose this document is to outline procedures and discuss methods that will assist interdisciplinary team members and project engineers in carrying out their responsibilities. Part with the organization and responsibilities of the team and of its members, Part 2 sets forth ten steps recommended for teams to follow in carrying out their charge. Part 3 discusses some of the practical operating problems, which teams have experienced, and possible solutions. Methods to achieve more effective interaction among interdisciplinary team members are discussed. Also, suggestions by which technical studies and community values and attitudes can be integrated into the team's final report are included,

Authors:
Social and Econonomic Planning Section of the WA State Department of Highways

Keywords:
attitudes, environmental, environmental impact, impact, Interdisciplinary team operations, Organization and Responsibilities, Design Team Studies, Study Plan Development and Methodology, Team Management, ITS, methods, Operating, planning, program, project, transportation, transportation planning, Washington

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Abstract:
Four different types of pavement marking materials were tested in Ring #6; three brands of striping paints and one thermoplastic stripping tape. These striping materials were applied on two sections, the ploymer ranked on the basis of appearance, wear, and whiteness.The thermoplastic striping material consistently outperformed the three paints. The materials wore more rapidly on the polymer cement concrete that on the asphalt concrete and the ranking order for the paints was different for the two sections. The Type #3 stud seemed to have worn the paints more rapidly than either #4, #2, GST, US and UST studs and tires in that order respectively. The superiority of the ethermoplastic striping tape was due to its thickness and its construction. Last year Kennametal, Inc. sent the Transportation Systems Section four different types of traffic paint and a thermoplastic striping tape. Time did not permit the testing of these materials in Ring #5, so these materials were tested in Ring # 6.

Authors:
Krukar,M.

Keywords:
asphalt, asphalt concrete, concrete, construction, effects, ITS, materials, pavement, Phase II, polymer, striping, striping paints, stripping, Studded, studded tire, studded tires, studs, System, systems, tire, tires, traffic, transportation

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Abstract:
A study was conducted on the character and significance of highway runoff waters for the Washington Department of Highways and the Federal Highway Administration. This preliminary appraisal of runoff quality consisted of a literature review and critique plus a limited amount of field sampling on SR 520. Although a large amount of information is present in the literature concerning urban run off, there is very little strictly related to highways and their rights-of- way. Highway runoff is similar t o urban area runoff but may be higher in heavy metals and oil. A significant fraction of the heavy m e t an l s, oil and nutrients are adsorbed to the dust and dirt fractions and then may be removed by sedimentation. Runoff from the lake bridges should have a very insignificant effect on Lake Washington in comparison with the urban run off to the Lake. Recommendations are made for mitigating runoff effects and for conducting an intensive study of highway run off water quality and its significance.

Authors:
Sylvester,Robert O., DeWalle,Foppe B.

Keywords:
bridge, bridges, environment, heavy metals, highway, highway runoff, Highways, ITS, metals, quality, review, runoff, sampling, sedimentation, Study, urban, vehicle emissions, Washington, water quality

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Abstract:
A study was conducted of rest area wastewater disposal problems and related factors for the Washington State Highway Commission during the period of June - December 1971. This report on the study is intended to present an evaluation of present rest area wastewater systems together with feasibility analyses of alternative methods of waste handling. It is not intended to be a preliminary engineering design report.Data are presented on rest area problems as reported to or observed by the writers on field visitations. This is followed by discussions of criteria and standards presently used in rest area design together with data on water usage for those rest areas where "complete" data were available. Laboratory analyses were made on rest area wastewaters and on a certain additive, " Bacterial Waste Disposer", that has been used in some of the rest areas. A discussion is included on possible future trends and uses of rest areas and the need to minimize water usage. Chapter XI1 contains the principal thrust of the report in its discussion of possible rest area wastewater disposal methods with an evaluation and some relative cost data. With increasingly stringent requirements for wastewater disposal, it seems apparent that rest area wastewaters must continue to be disposed of on highway property. If not, the Department would find itself, in most instances, with the task of operating continuously and effectually some rather complicated treatment systems that require trained operators, operational reports and effluent analyses, and systems that are not usually amenable to the flow characteristics of rest area wastewaters. Since much national attention is being given to these problems, it is hoped that new or improved treatment schemes may be developed in the future that will be appropriate for rest areas. An intent of this study has thus been to suggest means of wastewater disposal, presently available that would offer an improvement to the septic tank drain field method of disposal.Conclusions and recommendations drawn from the study are as follows:1. There is no question but that septic tank- drain field disposal systems would, because of their simplicity, be the preferred method of disposal if their installation were applicable to most rest areas and if they would, from past experiences here and elsewhere give some assurance of a freedom from operating difficulties over a period of just a few years.

Authors:
Seabloom,Robert W.

Keywords:
additive, Alternative, cost, criteria, data, design, developed, disposal, evaluation, flow, highway, improvement, ITS, methods, Operating, rest area, rest areas, Study, System, systems, Washington, Washington state

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Abstract:
The purpose of this study was to investigate the acoustic effects of two topping materials used on bridges in the Seattle area. One material was applied to the bridge on Interstate-5 which crosses the Duwamish River. It is an English product called Sprag-Grip which is supposed to have very good anti-skid properties, as well as the ability to stick to the road in thin layers thus making it suitable for the repair of worn surfaces. The other material is an epoxy -asphalt mixture which was applied to some sections of the Evergreen Point Floating Bridge over Lake Washington, particularly over sections where worn grating was causing excessive noise. Hopefully, this substance will be capable of long-term sticking in relatively thin layers. Of the two materials, it was found that the epoxy-asphalt topping on the Evergreen Point Floating Bridge was by far the quieter, and, at least as newly applied, proved to be very quiet at the road/tire interface. It is likely that this good acoustic performance is due to the smoothness of the surface rather than directly to the fact that the material contains epoxy. The role of the epoxy would be as an adhesive and to resist wear so that its original acoustic performance could be maintained for a considerable length of time. Spray-Grip, on the other hand, although slightly quieter than the rutted, worn roadway, was not as quiet as the original unworn road surface. Experimental Procedures The primary contribution of a road surface to the noise 'radiating from a vehicle is in the noise emitted at the road/tire interface; therefore, the major thrust of this effort was directed toward measuring this effect. There also were some measurements of community noise levels before and after the resurfacing of the bridges. The tire noise tests were taken on the right rear wheel of a Laboratory station wagon upon which a new tire was mounted (a Pennsylvania Patrol Special, size 8. 55-15). (The tread design and depth of this tire are shown on page 2. ) This tire was mounted on a wheel and used on the vehicle only daring tests. Between tests it was stored so that unnecessary wear would not change its acoustic character-teristics. The noise pickup device was a specially baffled microphone located about 7 inches from the road/tire interface by a bracket holding it on the outside of the tire. One of the major problems in making noise measurements of this type is to have a microphone that will pick up only tire noise and be baffled from wind noise. This problem has been solved by a microphone baffling system especially designed by this Laboratory.

Authors:
Foss,Rene N.

Keywords:
asphalt, bridge, bridges, community noise, design, Epoxy, experimental, floating bridge, highway, ITS, materials, mixture, noise, Noise Levels, noise measurements, performance, repair, roadway, seattle, Study, System, tests, tire, tire noise, Washington, wind, Wind Noise

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Abstract:
Implementation of automatic data acquisition using impulse techniques requires the development of a mechanical device to set an instrument package on the pavement, deliver an impulse of energy, and retrieve the instrument package. This is to be accomplished automatically with the vehicle proceeding down the highway.This report describes developments toward an improved system for accomplishing the desired results. The system employs a cleated belt supported by dual wheels in the configuration of a V- belt, which carries the instruments. A pneumatic chamber, which delivers an impulse of energy to the pavement and its supporting linkage, is also described. A bibliography of previous reports on impulse techniques of pavement testing is included.

Authors:
Brands,F., Cook,C. J.

Keywords:
computer, data, development, Energy, ITS, linkage, Non-destructive tests, pavement, pavement condition, pavement deflection, pavement evaluation, Portable tester

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Abstract:
The objective of this study was to determine the feasibility of developing a device or technique to provide rapid measurement of parameters indicative of roadway condition or structural capacity. Currently existing equipment is inadequate for making meaningful measurements with speed and convenience. Consequently, a new system called "impulse testing" has been proposed and its concepts proved in this study. This system incorporates new techniques of non-destructive testing, and is adaptable to mechanization for automatic operation. The system is based on the deflection of the pavement under impulse loading, and also on the energy propagation characteristics of the pavement. These two parameters are combined to formulate a quantity which is called the impulse index and which has a high degree of correlation with the structural properties of the pavement.

Authors:
Brands,F., Cook,C. J.

Keywords:
condition, Energy, equipment, impulse index, index, ITS, nondestructive testing, pavement, pavement deflection, roadway, speed

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Abstract:
At the request of the Washington Department of Highways two studies have been conducted by a team of specialists at the University of Washington Air Resources Program to determine the applicability of the Acoustic Radar to air quality modeling to mobile sources.At the request of the Washington Department of Highways two studies have been conducted by a team of specialists at the University of Washington Air Resources Program to determine the applicability of the Acoustic Radar to air quality modeling of mobile sources. Following an exploratory investigation, a comprehensive study was undertaken in which the atmospheric structure was measured by a modified Monostatic Acoustic Radar and the derived stability conditions were compared with the commonly used Pasquill-Turner stability classes, which are based on empirical data. This comprehensive study was performed over a three month period in the fall of 1976, when an unusually persistent air stagnation existed in the study area caused by a stationary high pressure system over the entire Northwest.The Evergreen Point Floating Bridge Toll Plaza in Bellevue, Washington was selected for test location.The carbon monoxide (CO) concentrations were measured at six strategically located sampling points and then compared with the computer model predictions utilizing atmospheric stability data derived by both the Pasquill-Turner and the Radar echo methods. The results indicated that the Acoustic Radar method of determining D & E stability classes is a more realistic approach than that of the Pasquill-Turner Method. Furthermore, the Radar method can also provide continuous remote sensing and recordings of atmospheric parameters. The variation of the inversion height, as measured by the Radar echoes has shown a reasonably good correlation with the variation of the measured CO concentration.

Authors:
Rossano,A. T., Badgley,F. I., Juhasz,P. C., Bang,G., Carsey,F.

Keywords:
Acoustic Radar, air pollution, air quality, Air Quality Modeling, bridge, carbon monoxide, Carbon Monoxide Perdictions, computer, Concentrations, condition, data, floating bridge, highway, Highways, ITS, model, modeling, prediction, pressure, program, quality, remote sensing, Remote Sensing Atmospheric Structur, sampling, stability, Transportation Pollutio, Washington

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