Washington State University

Regional Map Based Analytical Platform for State-Wide Highway Safety Performance Assessment


PI: Ali Hajbabaie (WSU), ali.hajbabaie@wsu.edu
Co-Investigators: Yinhai Wang (UW)
Dates: 01/16/2015 – 06/15/2016
Status: Completed
Project Information
Final Technical Report

Most traffic crash modeling and safety performance analysis cannot capture impacts of dynamic factors that are often critical for understanding the occurrence mechanism of crashes and are very labor intensive.To address these deficiencies, this proposed research takes advantage of the ongoing DRIVE Net research at the University of Washington to build large-scale safety analysis functions on the data-rich eScience transportation platform. The proposed research has the following objectives: Improve current crash modeling methods; Develop a Safety Performance Index (SPI); Monitor the safety performance of the state highway network on regional map using SPI; Develop a Potential Safety Improvement Index (PSII); Develop safety improvement analysis methods for accident hotspots based on the overlapped SPI and PSII. Read More

Assessment of Lube Oil Management and Self-Cleaning Oil Filter Feasibility in WSF (WA State Ferries) Vessels


PI: Liv Haselbach (WSU), haselbach@wsu.edu
Dates: 07/01/2013 – 7/31/2015

Lube oil management aboard vessels is a critical component of maintaining the life of a vessel engine.  Lube oil and the associated filters are expensive as is the maintenance and associated downtime.  Disposal of filters as a hazardous waste and handling of lube oil presents an environmental risk and additional costs.  Preventive and predictive management of lube oil can reduce lube oil maintenance costs and environmental risk, making the operation of Washington State Ferries (WSF) vessels more sustainable and cost effective.  To gain these benefits WSF needs to consider both the economic and the environmental impacts of the self-cleaning oil filters alternative.   Read More

NDE System for Determining Wood Guardrail Post Integrity


PI: Donald A. Bender (WSU), bender@wsu.edu
Dates: 07/01/2013 – 7/31/2015

Wood guardrail posts degrade over time due to decay, insects and weathering, and the Washington State Department of Transportation (WSDOT) needs an inspection system to determine the condition of posts along our highways to effectively prioritize future investments in guardrail upgrades. There are approximately 1.5 to 2 million guardrail posts on the state highway system.  Post inspection methods at WSDOT have never been uniformly defined, and the inspection opportunities have normally been associated with pavement preservation projects. Read More

Optimizing Asphalt Pavement Performance for Climate Zones Within Washington State


PI: Haifang Wen (WSU), haifang_wen@wsu.edu
Dates: 07/01/2013 – 8/31/2015

The pavements in the State of Washington witnessed great differences in performance, depending on the climatic zones. The climate west of the Cascade (referred to as West) is generally mild with wet winters. The climate in east of the Cascade (referred to as East) is drier with more extreme temperatures which often drop below freezing during winter. Studded tires are widely used in this area during winter time, creating additional damage (rutting and abrasion) to the hot mix asphalt (HMA) pavements. Read More

Laboratory Evaluation of Recycled Concrete as Aggregate in New Concrete Pavements


PI: Haifang Wen (WSU)
Dates: 03/01/2012 – 07/31/2014

The Washington State Department of Transportation (WSDOT) has initiated a research project to investigate the use of recycled concrete as aggregates (RCA) in Portland (hydraulic) cement concrete pavements (PCCP). The planned source for the RCA in the project will be from demolished pavements in western Washington, which generally contain very high quality aggregates. Aggregate quality varies across the state, and concrete made with RCA sourced elsewhere will likely have different properties.

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