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There are many problems that can occur at an unsignalized intersection. Problems could be specific to an individual intersection, occur along a section of road with successive unsignalized intersections, or be a systemic problem throughout a jurisdiction. The following represent common problems experienced at unsignalized intersections that are addressed in the Unsignalized Intersection Improvement Guide […]
Roadway Safety Institute: The roadway safety policy and leadership study built on previous review of evidence-based policy countermeasures for reducing road fatalities and serious injuries – and how legislators and policy leaders are addressing these issues through adoption of certain evidence-based policy countermeasures. The research is premised on the anticipated correlation of policy countermeasure adoption […]
From the Mountain Plains Consortium Report: Perception-Reaction Time (PRT) and deceleration rate are two key components in geometric design of highways and streets. Combined with a design speed, they determine the minimum required stopping sight distance (SSD). Current American Association of Highway Transportation Officials (AASHTO) SSD guidance related to PRT and deceleration rate are based […]
The EDC-5 innovations support FHWA’s goals of enhancing safety, improvising infrastructure, deploying innovation and serving America efficiently and effectively. We look forward to building on the success of past EDC cycles to expand adoption of proven innovations that save lives, money and time.
This study evaluated multiple low-cost treatments at signalized intersections. Improvements included basic signing, pavement marking, and signal enhancements. This strategy is intended to reduce the frequency and severity of crashes at signalized intersections by alerting drivers to the presence, type, and configuration of the approaching intersection. Many studies have explored the safety effectiveness of some of […]
TRB’s National Cooperative Highway Research Program (NCHRP ) Web-Only Document 220: Estimating the Life-Cycle Cost of Intersection Designs describes the Life-Cycle Cost Estimation Tool (LCCET). The LCCET spreadsheet allows users to compare alternative intersection designs based on initial construction costs, ongoing maintenance and operations costs, operational efficiencies for a variety of modes, safety effects, and […]
The purpose of this study was to estimate the reduction in serious injuries and deaths that could potentially be achieved through investment in highway infrastructure safety measures and to estimate the level of investment required to achieve those benefits. The United States faces a major challenge in improving the traffic safety performance of our road […]
This is a publication of the Federal Highway Administration (FHWA) that reports on safety developments from across the country. In This Issue: HSIP 2015 National Summary Report DDSA: Performing A Health Check-Up On Your Roadways Data Visualization: Telling the DataStory Express Yourself! Post a Road Diet Selfie Today Honolulu Uses Road Diets to Advance Complete […]
This report seeks to document ways to reduce crashes and fatalities from wrong-way crashes, horizontal curves, intersections, and J-turns. Report No.: MoDOT cmr 16-013 The Missouri Department of Transportation (MoDOT) sponsored this research project to investigate treatments that can reduce crashes and fatalities to further the goal of the Toward Zero Deaths (TZD) initiative. One […]
“I think the profile has gotten higher and higher and the feelings of the public are much higher than it used to be,” said Mike Lee, chairman of the Mobile Area Chamber of Commerce’s “Build the Bridge” Coalition about the need for an $850 million bridge over the Mobile River and accompanying expansion of the […]