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Development of Automated Roadway Lighting Diagnosis Tools for Nighttime Traffic Safety Improvement

Roadway lighting is a basic roadway infrastructure to ensure nighttime safety and security for all road users (motorists, pedestrians, cyclists, and transit passengers). To cost-effectively maintain a roadway lighting system, key tasks in infrastructure management include periodically measuring roadway lighting levels, diagnosing lighting performance based on collected data, and providing decision-making support for maintenance and […]

Evaluation of Cost-Effective Alternative Designs for Rural Expressway Intersections

High-speed expressways functionally operate like freeways but have at-grade intersections that provide critical access to communities via minor roadways. These intersections provide key economic entry points to jobs and economic development and serve as lifelines for rural communities. They also provide ingress and egress for emergency vehicles and serve as evacuation routes in cases of […]

Safety Effects of Transit Signal Priority: Magnitude and Mechanism

Transit signal priority (TSP) has been implemented for transit systems in many cities of the United States. In evaluating TSP systems, more attention has been given to its operational effects than to its safety effects. Existing studies assessing TSP’s safety effects reported mixed results, indicating that the safety effects of TSP vary in different contexts. […]

Investigation, Testing, and Development of an RFID System for Effective Maintenance of the Existing National Transportation Infrastructure

The focus of this project is the investigation, testing and further development of a RFID system to efficiently maintain the existing transportation infrastructure; especially Roadways and Bridges. For Example, in the event of an active snowfall or blizzard, snow may pile up and ice over on the roadway and bridges causing hazardous conditions for cars […]

Development of a real-time roadway debris hazard spotting tool using connected vehicle data to enhance roadway safety and system efficiency

Roadway debris and other unexpected obstructions, such as surface damage, or lane hydroplaning due to weather conditions like snow or precipitation, can lead to significant traffic delays or worse, crashes. The presence of roadway debris is particularly concerning in high-traffic and high-speed roadways where dense traffic conditions reduce visibility and large volumes of vehicles are […]

Strategic Investment Decisions on Highway Improvement Projects

Setting priority in highway improvement projects where safety consideration plays a differentiating role in the decision making process. As such, quantitative safety is now being recognized as an important element in the project selections process at the planning phase. Quantitative evaluation of safety performance of particular roadway facilities, for example, segments and intersections, is critical […]

Creative Utilization of Urban Roadway Facilities with Predictive Safety Assessment Tool – Phase 1

The impact of predictive safety assessment based on quantitative methodology of the Highway Safety Manual (HSM) is significant particularly in urban roadway facilities. The responsibilities of safety professionals, transportation planners, and decision makers are critical for safe and efficient transportation in the ever-increasing travel demand in urban areas. The purpose of this study was to […]