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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 […]
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 […]
