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Wang, Y. WA-RD 904.1 Real-Time Parking Information Integration, Visualization, and Prediction 2023 TRAC/UW
Abstract:
The trucking industry plays a critical role in freight transportation in the United States. One major problem commonly recognized across the country is inadequate truck parking supply because existing truck parking facilities are struggling to meet the demand of increasing numbers of trucks on the road. Lack of parking spaces and real-time parking availability information greatly exacerbates the uncertainty of trips and often results in illegal parking and/or overtime driving. In this project, WSDOT worked with the research team at the University of Washington (UW) Smart Transportation Applications and Research Laboratory (STAR Lab) to conduct a truck parking pilot study on advanced truck parking management systems. Specifically, this project developed a comprehensive solution in which a parking detection system collects and processes robust, real-time parking data, a predication algorithm estimates future parking availability information, and an online parking availability information platform accessible from smart phones and other personal electronic devices provides real-time and predicted parking information. Empowered by artificial intelligence and a deep learning prediction algorithm, the pilot Truck Parking Information Management System (TPIMS) achieved an error rate of less than 12 percent in predicting parking availability from 10 minutes to four hours ahead. Both the real-time and multi-timescale prediction occupancy information is successfully disseminated via a customized website and user applications in real time. This real-time truck facility monitoring information and truck parking availability prediction will provide information to truck drivers for trip routing and scheduling arrangements.

Authors:
Wang, Y., Yang, H., Zhuang, Y., Sun, W.

Keywords:
Truck parking, information management system, parking prediction, parking demand, parking facilities,


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Haselkorn, M.E. Model Deployment of the Virtual Coordination Center for Multimodal Integrated Corridor Management 2023 FHWA
Abstract:
The Virtual Coordination Center (VCC) is a digital collaborative environment for integrated multimodal corridor management. Under the Federal Highway Administration project “Model Deployment of the Virtual Coordination Center for Multimodal Integrated Corridor Management,” an operational community of state, city, and county agencies including law enforcement, transit, and transportation departments developed, deployed, and evaluated a VCC for interagency management of the Seattle urban corridor. Led by the Washington State Department of Transportation (WSDOT) and the University of Washington, this project produced an innovative collaborative environment that now supports Seattle Fire (SFD), Police (SPD), and Transportation (SDOT), King County Metro Transit, Sound Transit, Washington State Patrol (WSP), and WSDOT in their interagency management of incidents that affect the regional transportation system. The VCC provides daily operational value and is designed to support the management of high-impact situations that put unusual stress on the Seattle-area transportation corridor. The VCC supports increased shared situational awareness, enhanced incident and congestion management, and coordinated population movement.

Authors:
Haselkorn, M.E., Phelps, T.

Keywords:
Virtual coordination, incident management, multimodal, congestion management,


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Hallenbeck, M.E. Evaluation of the Use and Performance of Via to Transit in the Puget Sound Region 2020 TRAC/UW
Abstract:
Sound Transit and King County Metro teamed as sub-recipients on a project led by Los Angeles Metro to demonstrate the viability of a partnership with a private sector transportation network company to increase access to transit through the provision of on-demand, first-mile/last-mile transit access services. This independent evaluation report concentrates on the actual ridership impacts of the Via to Transit service; that is, how many people chose to use Via, whether those individuals represented all segments of the population living in the study area, and whether the availability of the Via service for first-mile/last-mile trip making changed their use of Link light rail or bus.

Authors:
Hallenbeck, M.E., Van Roijen, A., Avery, R., Zyuzin, D.

Keywords:



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Dahl, P.H. WA-RD 861.2 Measurements of Pile Driving Noise from Control Piles and Noise-Reduced Piles at the Vashon Island Ferry Dock 2017 TRAC/UW
Abstract:
As the part of the Washington State Department of Transportation (WSDOT) pile attenuation test program, researchers from the University of Washington Applied Physics Laboratory (APL-UW) conducted underwater sound measurements on 7 and 8 December 2015 at the Vashon Island ferry dock. A WSDOT team operating closer to the construction barge also took measurements. The goals of the APL-UW team were to measure the underwater sound field over nearly the entire water column and away from interfering structures, as well as to make robust estimates of sound mitigation performance of two test pile designs in terms of sound exposure level (SEL) and peak pressure. Measurements on the R/V Robertson were taken at a range of 120 m from the construction barge complex and pile source location and at a water depth 12.5 m by using a vertical line array (VLA) that spanned 1.25 to 9.25 m in depth. A comparison of the 7 December measurements from the double wall test pile with the control pile showed reductions in peak pressure (8.7–13.5 dB), RMS pressure (8.8–12.7 dB), and SEL (7–10.3 dB). A comparison of the 8 December measurements from the mandrel test pile with the 7 December measurements from the control pile showed reductions in peak pressure (11.4–14 dB), RMS pressure (10.8–12.6 dB), and SEL (9.3 and 11.1 dB). The reduction in peak pressure generally increased as measurement depth on the VLA increased; for the RMS and SEL metrics, no trend was observed.

Authors:
Dahl, P.H., Dall'Osto, D.R., Laughlin, J.

Keywords:
Impact pile driving, Underwater sound, Sound mitigation, Attenuation, Sound exposure level (SEL),


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Arduino, P. WA-RD 874.1 Numerical Evaluation of Forces on Piled Bridge Foundations in Laterally Spreading Soil [Caution: 20MB file] 2017 TRAC/UW
Abstract:
The response of piled bridge foundations to liquefaction-induced lateral soil deformation is an important design consideration in seismically active regions. Recent research and case history data suggest that three-dimensional deformation of the approach embankment can significantly influence the loads placed on the embedded foundations during a flow failure or lateral spreading event. For example, the 2010 Maule earthquake in Chile caused widespread lateral spreading in the soil surrounding the Mataquito River bridge; however, only insignificant structural damage was observed in the bridge itself. The discrepancy between the amount of soil deformation and structural damage suggests that design procedures for this load case that do not make adequate consideration for 3-D soil deformation mechanisms may lead to overly conservative and expensive design solutions. In contrast, observed lateral spreading and damage near the Llacolén bridge was more relevant and resulted in the collapse of one of the approach sections. The Llacolén bridge approaches showed less 3-D effects on both sides of the bridge and therefore larger loads on the structural components. In this project, finite element models of the Mataquito River and Llacolén bridges were created with the OpenSees computational framework to investigate possible reduction in foundation loads during lateral spreading, as implied by the observed structural damage at the example sites. These models included beam on nonlinear Winkler foundation models, dynamic effective stress models of the bridge-foundation-soil system in plane strain, and 3-D models of the bridge abutments, approach embankments, and surrounding soils. This numerical work sought to frame load reduction mechanisms in the context of a simplified analysis procedure for the lateral spreading load case. The results of the numerical models for the Mataquito and Llacolén bridges, along with a preliminary parameter study conducted with an independent set of 3-D finite element models, indicated that consideration for the 3-D geometry of the bridge site and structure may result in tangible reductions in foundation bending demands and abutment displacements in comparison to those returned by a plane strain description of the problem or simplified analysis using 1-D models. This analysis procedure was modified to better consider the findings of this work, and it is recommended for use in the design of bridge foundations subjected to lateral spreading. Finally, the report proposes an approach to estimate the reductions in abutment displacement and associated foundation bending demands for a given site geometry. The latter is based on results from a preliminary parametric study and requires further development and validation for use in practice.

Authors:
Arduino, P., McGann, C.R., Ghofrani, A.

Keywords:
Lateral spreading, deep foundations, drilled shafts, soil liquefaction, lateral loads, liquefaction-induced lateral displacements,


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Moudon, A.V. WA-RD 805.1 Land Development Risks Along State Transportation Corridors 2013 TRAC/UW
Abstract:
Land development that is not coordinated with transportation planning can compromise the performance of Washington\'s state routes.  Identifying land at risk for development along state routes can provide opportunities for proactive, collaborative planning to improve access, mobility, and safety while supporting economic development.  This project, described in two parts, provides tools to help turn adverse risks of land development into opportunities to make route improvements.      In part one, systems for identifying land at risk for development were developed for the state and local levels from relevant literature and expert input.   Risk factors for land development at the state level include historic population and job growth, population and job forecasts, and traffic conditions.  Additional risk factors at the local level include regulatory constraints, critical areas, vacant and undeveloped lands, recent sales history, building permit history, and sewer and water utilities.  the local level system was applied to three case study areas.  Results generally agreed with local knowledge, yet the method offered an objective and systematic means for comparing corridors across the state fairly.      In part two, a menu of strategies for responsibly developing state routes was developed from current WSDOT practices, literature on standard approaches, and reports of novel solutions.  Strategies were classified as planning and coordination activities, non-engineering and engineering strategies, and funding/enforcement strategies.   

Authors:
Moudon, A.V., Sheikh, A., Stewart, O., Kraus, A., Hallenbeck, M.E.

Keywords:
Land development, right of way, risk analysis, transportation planning, corridor planning, forecasting, land use, access management,


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Moudon, A.V. WA-RD 806.2 Sidewalk Data in King County\'s Urban Growth Boundary 2013 TRAC/UW
Abstract:
This report describes the development of geospatial sidewalk data for the King County Urban Growth Area. Prior to the development of this data set, sidewalk data in King County were limited to select jurisdictions and existed in multiple, sometimes incompatible, formats. Existing sidewalk data were collected from 30 of 40 jurisdictions and standardized to a geographic information system (GIS) data format that stores sidewalk coverage as attributes of King County street network centerlines. For each street segment, each sides was coded as full, no, or partial sidewalk coverage. An automated coding method was developed to standardize existing data when possible. Sidewalk coverage for jurisdictions with no existing sidewalk data or with data formats incompatible with automated coding were coded manually with the aid of internet mapping resources. A total of 27 jurisdictions, including unincorporated King County, were manually coded. Overall rates of agreement between automated and manual coding were 0.95, with higher rates of agreement for street segments with full and no (0.94 to 0.97) compared to partial sidewalk coverage (0.70 to 0.72).

Authors:
Moudon, A.V., Kang, B., Scully, J., Stewart, O.

Keywords:
Sidewalks, pedestrian travel, walking, pedestrian, infrastructure, GIS data,


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Weiland, C.D. WA-RD 744.4 Life Cycle Assessment of Portland Cement Concrete Interstate Highway Rehabilitation and Replacement 2010 TRAC/UW
Abstract:
Life Cycle Assessment (LCA) is a tool that can be used to identify ways to decrease the environmental impact of a product or process and to inform decision makers of the consequences of changes to the product or process. LCA encompasses all aspects of a process or product from “cradle to grave”, including material extraction, transport, production, maintenance, and removal or recycling. This study is a comparative LCA of three different replacement options for an aging Portland cement concrete (PCC) highway: Replacement with a new PCC pavement, replacement with hot mix asphalt (HMA) pavement, and cracking, seating and overlaying (CSOL) the existing pavement with HMA. Each LCA includes an appropriate maintenance schedule so that the pavements will have a 50 year life span and can be reasonably compared. The environmental impacts have been assessed according to common environmental concerns, such as global warming potential and acidification. This paper summarizes those impacts and provides information and recommendations to build “greener” highways in Washington State.

Authors:
Weiland, C.D., Muench, S.T.

Keywords:
Life cycle assessment, environment, concrete, pavement, portland cement, hot mix asphalt, crack seat and overlay, life cycle inventory,


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Muench, S.T. WA-RD 744.2 A Brief History of Long-Life WSDOT Concrete Pavements 2010 TRAC/UW
Abstract:
The concrete pavements that were originally constructed in Washington State as part of the Interstate construction program have performed remarkably well considering the dramatic increase in the anticipated traffic loads. To date, the primary distress on the concrete pavements in Washington State has been in the form of joint faulting (due to lack of dowel bars and underlying base/subgrade conditions), longitudinal cracking (which is believed to have occurred 3 to 5 years after construction) and wear due to studded tires. A number of factors have contributed to the long-life of these concrete pavements, such as, short joint spacing (usually 15 ft – 4.6 m), thickness (8-9 inches, 200-225 mm) and aggregate quality. However, a number of design modifications have evolved over time to improve pavement performance. These include the use of dowel bars, dowel bar type, mix design, hot mix asphalt base, joint design and joint spacing. This research documents the design and performance of the concrete pavements built in the 1960s, summarizes the design modifications and resulting pavement performance that has taken place over the last 40 years, summarizes the current construction practices and discusses

Authors:
Muench, S.T., Pierce, L., Uhlmeyer, J., Anderson, K.

Keywords:
Concrete, pavement, performance, history, wear,


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Hallenbeck, M.E. The Role of the Highway Network Manager 2006 TRAC/UW
Abstract:
The role of the highway network manager (HNM) extends beyond simply overseeing key operational decisions. It includes ensuring that the data required to make those decisions are obtained and correctly used; that the facility performance that results from selected decisions is routinely tracked; that information is used to both improve control decisions and direct the resources of the agency; and that the decision criteria used to make those decisions accurately reflect the priorities of the transportation authority. To accomplish this job, the HNM must have access to, and effectively use, a variety of technologies and tools. This paper discusses what it takes to effectively perform such a job.

Authors:
Hallenbeck, M.E.

Keywords:
Smart Highways, operations, manager, network, roadway,


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Massman,J. WA-RD 578.1 Implementation of Infiltration Ponds Research 2003 TRAC/UW
Abstract:
Stormwater infiltration facilities help reduce the hydrologic impacts of residential and commercial development. The design of these facilities is particularly challenging because of large uncertainties associated with predictions of both short-term and long-term infiltration rates. Full-scale “flood tests” conducted at four infiltration facilities in western Washington suggest that lateral flow along the sides of the ponds may be significant. This is similar to “bank storage” that occurs in stream channels. More efficient designs may require a larger ratio of side area to bottom area and that maintenance activities should be considered for the sides as well as the bottom of the pond. Saturated hydraulic conductivity values estimated from measuring air conductivity and from regression equations derived from grain size parameters were compared to full-scale infiltration rates for 15 sites in western Washington. The estimated values for saturated hydraulic conductivity were up to two orders-of-magnitude larger than the full-scale infiltration rates for some sites and were two orders-of-magnitude smaller at others. These results show that infiltration rates cannot be reliability estimated on the basis of soil properties alone; information related to the hydraulic gradient is also important. Computer models were compared to identify the flow systems for which saturated models provide reasonable approximations. The difference between saturated and unsaturated flow models was lowest in highly permeable soils and increased as the hydraulic conductivity of the soil decreased. The simulations suggest that steady-state infiltration rates calculated with a saturated model will be 20 to 30 percent smaller than rates calculated with an unsaturated model for the range of hydraulic conductivities typically found beneath Western Washington infiltration ponds. A comparison of steady-state and transient simulations showed that the steadystate assumption may significantly underestimate infiltration rates.

Authors:
Massman,J.

Keywords:
Stormwater infiltration facilities, infiltration rates, hydraulic conductivity estimates, full-scale, infiltration tests, stormwater infiltration design, numerical simulations,


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Gribble, R. P. WA-RD 548.1 Development of an Automated Deer Detector 2002 WSDOT
Abstract:
The Washington State Depatment of Transportation (WSDOT) has a requirement to place detectors that will detect the presence of deer along selected roadways. Battelle Marine Sciences Laboratory was tasked with the design and fabrication of a detector system that would consist of a beam of energy emitted from an emiter that would be received by a detector placed at a maximum distance of 1000 feet along the side of the road. The height of the beam above the ground needed to be approximately 3 feet, and there needed to be a clear line of sight between the emitter and the detector. The design incorporated two emitters, two detectors, and two sign modules into one full system. One set of each would be placed on either side of the roadway, with the distance from the side of the roadway and the type of posts used to be specified by WSDOT. A Family Radio Service (FRS) radio communication system would relay an alarm signal to a traffic warning sign also placed along the side of the roadway. The system needed to be battery powered and capable of being charged by solar power. It also needed to be robust and opeate under most all anticipated weather conditions.The primary purpose of this program was to identify the best technology that would provide the most robust system that is relatively weather independent. Commercial availability and low cost were of prime importance. A single channel or one emitter, one detector, and one sign module was constructed and tested. This single channel system was set up on a test range on Battelle property to determine the correct configuration to be used, and the range, detection sensitivity, weather affects, and robustness were tested.

Authors:
Gribble, R. P.

Keywords:
Deer, detection, warning system,


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Dunston, P. S. Costs and Benefits of Constructibility Reviews 2001 Transportation Research Board, NCHRP
Abstract:
Together, NCHRP Report 390, \"Constructibility Review Process for Transportation Facilities,\" and NCHRP Report 391, \"Constructibility Review Process for Transportation Facilities--Workbook,\" provide rationale, explanation, and guidelines for a state highway agency (SHA) to implement its own constructibility review process (CRP). The American Association of State Highway Transportation Officials (AASHTO) Subcommittee on Construction has subsequently produced a more concise Constructibility Review Best Practices Guide to encourage wider CRP implementation among state highway agencies. This report follows the aforementioned in further addressing barriers to implementation and in developing procedures for measuring costs and benefits of CRP\'s. Critical elements that are emphasized for CRP implementation are (1) the institutionalization of a Constructibility Champion with responsibility to oversee CRP practice and an ongoing training program; (2) a resolution to acknowledge the shortcomings of a schedule-driven process or a quality-driven process; (3) a formal written policy on the timing, procedures, tools, and appropriate level of review; and (4) an industry-endorsed procedure for contactor involvement in the CRP. The benefit-cost model produced from this study emphasizes the impact of the CRP in reducing costs due to inefficiencies in the design process for transportation projects and constructibility oversights in the design.

Authors:
Dunston, P. S., McManus, J.F., Gambatese, J.A.

Keywords:
Constructability review, cost-benefit, modeling,


External Links:
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=1466
Hallenbeck, M.E. Choosing the Route to Traveler Information Systems Deployment 1998 TRAC/UW & ITS America
Abstract:
The balance of public and private sector roles and responsibilities has been a principal topic of debate within the ATIS Committe of the Intelligent Transportation Society of America (ITS America) for many years. In February 1994, the ATIS Committee sponsored its first major effort in this area, a workshop on Service Delivery Models for ATIS. Focusing on the appropriate roles for the public and private sectors, participants developed service delivery models for exchanging information between data sources and ATIS devices. The models addressed not only technical issues but institutional and liability issues as well. The process revealed a solid consensus on the basic functions and information flows involved in collecting, fusing, and distributing traveler information. Participants had different views of the proper roles for the private and public sectors, but there was a fair amount of agreement on key issues, such as the need for a publicly provided minimum level of service.In l995 and l996, as the National ITS Architecture took shape, the concept of information service providers (ISP) as fusers and disseminators of traveler information emerged. The ISP concept reflected the better understanding we were gaining about the complexity of providing timely, accurate,and useful information to travelers. By 1997, it became clear that public officials who were leading efforts to interact with the private sector to provide ATIS services in their region or state were doing so without much assistance, save the personal contact they may have had with officials from other areas of the country who were grappling with the same issues. What was missing was a collected body of information that would present the entire set of issues that needs to be considered when agencies plan their role in ATIS. This document is meant to serve as that body of information.

Authors:
Hallenbeck, M.E., TRAC Staff

Keywords:
Advanced traveler information systems, ATIS, business plan, urban transportation,


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External Links:
https://highways.dot.gov/media/2246
MacLachlan, S. IU 95.6 Affirmative Action Process and Programs at the WSDOT 1995 Innovations Unit/TRAC
Abstract:
This report considers the Washington State Department of Transportation\'s (WSDOT) affirmative action and diversity-related programs for two of the agency\'s top occupational categories: official and administrators and professional engineers. The purpose of the report is not to evaluate the WSDOT\'s affirmative action program; rather, it is to present publicly available information in a format that makes the following issues more readily understandable: 1) How the WSDOT establishes its affirmative action goals, the data sources upon which they are based, and the agency\'s resulting affirmative action goals; 2) How the demographic makeup of the WSDOT\'s professional engineers and officials and administrators compare with the agency\'s stated affirmative action goals; and 3) Net demographic change among these groups at the WSDOT between 1990 and 1994.

Authors:
MacLachlan, S., Rutherford, G.S., Ishimaru, J.M.

Keywords:
Affirmative action, program, engineers, administrators, transportation,


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Rutherford, G. . TRR 940383 Transportation Demand Management: Case Studies of Medium-Sized Employers 1994 TRB
Abstract:
In this report the authors explore the effects of various Transportation Demand Management (TDM) strategies on single-occupancy vehicle (SOV) mode split. They describe 19 TDM programs implemented by medium sized employers (100 to 450 employees) in several areas of the western United States. Employers are found to practice a wide range of TDM strategies, including HOV incentives such as transit pass subsidies, and SOV disincentives such as parking charges. Parking charges are found to be the most effective TDM strategy in urban areas where transit service is good and parking is often expensive and scarce. On the other hand, in suburban areas, where transit access is often poor and where parking is usually plentiful and free of charge, generous alternative-mode travel allowances are found to be necessary in successful TDM programs.

Authors:
Rutherford, G. ., Badgett, S., Ishimaru, J.M., MacLachlan, S.

Keywords:
Transportation demand management, TDM, mode split, incentives,


External Links:
https://onlinepubs.trb.org/Onlinepubs/trr/1994/1459/1459-002.pdf
Ulberg, C. Evaluation of the Puget Sound Telecommuting Demonstration: Survey Results & Qualitative Research 1993 TRAC/UW
Abstract:
This study was conducted for the Washington State Energy Office. The Puget Sound Telecommuting Demonstration project, which ran from mid 1990 to mid 1992, included 25 public and private organizations and began with nearly 300 telecommuters. The demonstration involved one of the most extensive evaluations yet undertaken to understand many aspects of telecommuting, including transportation and energy impacts, organizational impacts, and effects on people\\\'s personal lives. This report covers several elements of that evaluation. The Puget Sound Telecommuting Demonstration project provided unique information about the experience of telecommuting. It covered a wide variety of organizations, both public and private, large and small, and differing in their degrees of bureaucratization and enthusiasm about introducing telecommuting to their employees. The researchers collected data not only from telecommuters but form supervisors, co-workers, and a comparison group of other organization employees. Ethnographic data were collected in a variety of settings, and small groups of participants were interviewee periodically to gain additional insights into their experiences. Detailed observations were collected at the state-sponsored telework center, and special studies were conducted regarding productivity assessment, and focusing on people who stopped telecommuting during the year. This comprehensiveness allowed insights into the impacts of telecommuting on organization and work group functioning that could not be determined from a study of telecommuters alone. This information allowed the investigation of policies to mitigate some of the negative impacts of telecommuting and to begin to understand how widespread telecommuting may become.

Authors:
Ulberg, C., Gordon, A., Spain, D., Fortenbery, E., Whitaker, B., Fireman, S.

Keywords:
Telecommuting, demonstration, work from home, public, private, productivity, survey, data analysis,


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Hallenbeck, M.E. Freeway Management Working Paper: Current Development of Traffic Models 1988 TRAC/UW
Abstract:
This paper provides an overview of traffic models that are available for use by WSDOT. It is intended to provide a general review of modeling capabilities that exist today, and present a future vision of what these capabilities will be in the near future. The information collected for this paper was used to select models to be tested for improving the departments ability to manage traffic during construction projects as well as during normal operation. Material presented in this document is based primarily on an extensive literature search, supplemented by the review of the documentation for a limited number of models, and the experience of project staff. Many of the models reviewed are still undergoing modification and refinement and many of these changes are not addressed in the literature. Thus, the reader should be aware that some models discussed within have capabilities not mentioned.

Authors:
Hallenbeck, M.E., Lin, C.

Keywords:
Traffic, management, modeling, construction,

Rutherford, G.S. UTPS / SLIM Simplified Limited Instruction Manual: Program Documentation 1985 TRAC/UW
Abstract:
Over the last 25 years, the Urban Mass Transportation Administration (UMTA) has developed a comprehensive series of urban transportation planning computer programs. Known as the Urban Transportation Planning System (UTPS), these programs require extensive and detailed documentation best suited for large, regional planning agencies. To facilitate urban travel forecasting by smaller agencies and educational institutions, this manual, the Urban Transportation Planning System / Simplified Limited Instruction Manual (UTSP/SLIM) was developed. UTPS/SLIM simplifies and repackages, without changing the software, the existing UTPS documentation. The UTPS/SLIM user is presented with only the most relevant and necessary program functions.

Authors:
Rutherford, G.S., McCormack, E.D., Hallenbeck, M.E., Harvey, R.

Keywords:
UTPS, Urban Transportation Planning System, SLIM, Simplified Limited Instruction Manual, software, planning,

Babaei, K. WA-RD 055.1 Deterioration of Concrete Bridge Decks and Review of the WSDOT Bridge Deck Program 1982 TRAC/UW
Abstract:
This report reviews the program developed by WSDOT to minimize premature deterioration of concrete bridge decks subject to chloride deicing chemicals. The review includes WSDOT\'s deck rehabilitation strategy, deck protective systems, deck evaluation techniques, and research and special investigations. The report includes a number of recommendations based on information obtained from previous research relative to the WSDOT program. Among protective systems used or proposed for use, cathodic protection appeared to be the most promising approach, short of removal of all chloride-contaminated concrete, that will stop active corrosion of steel in bridge decks. Information evolving form the study also pointed to waterproofing membrane and AC overlay as a relatively inexpensive approach to protect existing bridge decks against corrosion. However, the appears to be a lack of hard data to support the effectiveness of this system.

Authors:
Babaei, K., Terrel, R.L.

Keywords:
Bridge deck, concrete, chloride deicing, steel bridge deck,


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