The U.S. highway transportation network relies on the health and integrity of major infrastructure elements such as bridges. Frequently traveled parts of Oregon are within the seismically active Pacific Northwest, and many of the bridges were designed and built to lateral demands that were assumed… Read More

Most transportation agencies rely on point detectors (e.g., inductive loops, axle detectors) located at specific points on highways to collect data on traffic volumes, vehicle classes, and other relevant attributes of traffic. By utilizing the data collected from these point detectors, researchers… Read More

This report describes the preliminary work to develop the Oregon Traffic Safety Data Archive (OrTSDA). The mission of OrTSDA is to “build the knowledge base of traffic safety data in Oregon.” It is hoped the archive will become a valuable traffic safety data resource with researchers, practitioners… Read More

As truck loads continue to get bigger, the demand on many aging bridges increases. Slender steel structural elements widely used in bridge superstructures and braced substructures to resist these loads are built primarily for tension, however, and can buckle under compressive loads. Portland… Read More

Objective The Oregon Department of Transportation conducted a test of an innovative technology to replace fuel taxes with mileage fees. In the test, some vehicles were charged a flat fee per mile and others were charged differential fees that were higher for travel in the Portland metropolitan… Read More

The purpose of this report is to identify current practices and challenges with collision diagramming at ODOT’s Crash Analysis and Reporting (CAR) Unit, research available tools, and to recommend a collision diagramming tool for implementation. Read More

With rates of obesity, heart disease, and related health problems increasing in the U.S., health professionals, planners, and policy makers are looking for ways to increase physical activity through changing urban form. While much of the focus is on walking, bicycling offers many benefits and… Read More

In June 2003 Oregon Driver and Motor Vehicle Services (DMV) implemented a new mandatory medical reporting requirement as required by ORS 807.710, in which some Oregon physicians and health care providers are mandated to report to DMV patients with certain severe and uncontrollable cognitive and… Read More

The rate of absenteeism averages about 3.5% across all occupations in the US labor force, while in the transit industry absenteeism among operators exceeds 10%. Prior research attributes the transit industry’s higher operator absenteeism to factors falling in three general categories: 1) higher… Read More

The Federal Highway Administration (FHWA) has put a high priority on the use of existing dynamic message signs (DMS) to provide travel time estimates to the public. The Oregon Department of Transportation (ODOT) has three DMS in the Portland metropolitan area configured to display travel time… Read More

The Oregon Department of Transportation (ODOT) Safety Investment Program (SIP) seeks to allocate safety funds in a manner that maximizes safety benefits on preservation projects and at specific high-crash locations. The SIP philosophy targets highway sections for investment with the premise that… Read More

In June 2003 Oregon Driver and Motor Vehicle Services (DMV) implemented a new mandatory medical reporting requirement as required by ORS 807.710, in which some Oregon physicians and health care providers are mandated to report to DMV patients with certain severe and uncontrollable cognitive and… Read More