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The first National Roundabout Week will take place the third week of September (17th – 21st). The purpose of NRW will be to raise awareness about roundabouts and to provide a national platform to share the successes that state, local and tribal transportation agencies have had with them. FHWA will be using their social media […]
The overall objectives of this research were to identify and explore alternative safety data sources and analysis perspectives, and demonstrate the potential utility of these alternative approaches in increasing understanding of precipitating events and predisposing factors for crashes occurring on horizontal curves and at unsignalized intersections along rural two-lane roads. The project team executed the […]
ALDOT: The public will have an opportunity to have its say about the design of the future space under the bridges of a major interstate that runs through Birmingham. Three sessions – 10 a.m. to noon, noon to 2 p.m. and 5-7 p.m. – will be held on July 17 at the Boutwell Municipal Auditorium. […]
The modern highway system has experienced considerable changes since the interstate system and other limited access highways were first designed and constructed in the mid-1900s. Population movement outside of cities and the increased movement of passenger and freight traffic have led to increased congestion and necessitated new approaches for maintaining mobility. Mobility and capacity enhancements, […]
FHWA-HRT-17-066 The Federal Highway Administration established the Development of Crash Modification Factors (DCMF) program in 2012 to address highway safety research needs for evaluating new and innovative safety strategies (improvements) by developing reliable quantitative estimates of their effectiveness in reducing crashes. The ultimate goal of the DCMF program is to save lives by identifying new […]
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 […]
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 […]
Buckle Up – Every Trip. Every Time. Thanksgiving weekend, millions will hit the roads, eager to spend time with family and friends. It’s one of the busiest travel times of the year, and unfortunately more people on the roadways means the potential for more vehicle crashes. During the 2016 Thanksgiving weekend (6 p.m. Wednesday, November […]
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 […]
