While bicyclists and other active travelers obtain health benefits from increased physical activity, they also risk an uptake of traffic-related air pollution. But pollution uptake by urban bicyclists is not well understood due to a lack of direct measurements and insufficient analysis of the… Read More

As video data collection and storage technologies become ubiquitous and inexpensive, transportation agencies struggle to process and extract "intelligence" or useful information from growing libraries of archived video data. In some cases useful video is lost because agencies cannot justify the… Read More

Transit service reliability is important to both passengers and transit agencies. Slow and unreliable transit service may increase transit user costs in the short term and reduce transit mode share and ridership in the long term, which in turn may lead to higher levels of congestion, emissions,… Read More

Since the 1990s, federal legislation and local and state politics have changed the landscape for metropolitan planning of land use and transportation, and Metropolitan Planning Organizations (MPOs) are scrambling to react. There is an urgent need for improved models that address the… Read More

This report presents finding from research evaluating U.S. protected bicycle lanes (cycle tracks) in terms of their use, perception, benefits, and impacts. This research examines protected bicycle lanes in five cities: Austin, TX; Chicago, IL; Portland, OR; San Francisco, CA; and Washington, D.C.,… Read More

The role of walking in the development of healthy, livable communities is being increasingly recognized. In urban areas, intersections represent locations where different modes converge, and are often viewed as deterrents to walking. This is due to the unwarranted and often unnecessary delays… Read More

For a number of reasons (congestion, public health, greenhouse gas emissions, energy use, demographic shifts, and community livability to name a few), the importance of walking and bicycling as transportation options will likely continue to increase. Currently, policy interest and infrastructure… Read More

This research will develop a realistic installation guideline that supports the requirements of advance traffic signal controller operations, hybrid detection installations, and non-invasive detection optimization. This guideline shall provide prototypical detection configurations and new timing… Read More

Research questions include: How does intersection sight distance (ISD) impact crashes? How can temporal variations in ISD (e.g., foliage) be quantified? Should quality of ISD and the presence of objects to judge depth perception be considered? How does the roadway and traffic affect the… Read More

The overall goal of the proposed research is to quantify the safety performance of alternative traffic control strategies to mitigate right-turning vehicle-bicycle crashes at intersections in Oregon. Read More

Racial minorities are disproportionately represented in pedestrian traffic fatalities, indicating a significant public health and safety issue. Psychological and social identity-related factors have previously been shown to influence drivers’ behaviors toward pedestrians. If drivers’ behavior… Read More

The objective of the project is to evaluate the effectiveness and efficiency of non-emergency medical transportation services (NEMT). The first objective of this project was to design a framework that could be used to evaluate the effectiveness and efficiency of non-emergency transportation… Read More