TRB’s National Cooperative Highway Research Program (NCHRP) Report 781: A Debris Management Handbook for State and Local DOTs and Departments of Public Works provides debris management practices for local, tribal, and state departments of transportation and for public works agencies. A PowerPoint
TRB’s Transportation Research Record (TRR): Journal of the Transportation Research Board, No. 2442 consists of 15 papers that examine a time–space diagram; using third-party data for travel demand modeling; calibration of a rail transit assignment model with automated fare collection data and a p
TRB’s Transit Cooperative Research Program (TCRP) Report 117: Design, Operation, and Safety of At-Grade Crossings of Exclusive Busways explores planning, designing, and operating various kinds of busways through roadway intersections. The report examines at-grade intersections along busways withi
TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2384 consists of 13 papers that explore the effectiveness of “vehicle entering when flashing” signs; countdown-only pedestrian change interval displays; driver perception and reaction time; dilemma zone identi
In 2010 and 2011, safety staff with FHWA and the Michigan Department of Transportation (MDOT) analyzed 110 wrong-way crashes that occurred on the Michigan freeway system during the 5-year period from 2005 to 2009. What they found regarding the characteristics of wrong-way drivers corroborated ear
Driving the wrong way on freeways has been a nagging traffic safety problem since the interstate highway system was founded in the late 1950s. Despite four decades of highway striping and sign improvements at freeway interchanges, the problem persists.
Studies, such as those performed b
TRB’s National Cooperative Highway Research Program (NCHRP) Report 551: Performance Measures and Targets for Transportation Asset Management describes the research effort associated with production of the report and provides the current state of practice on the use of performance measures, princi
This memo presents a synthesis of existing practice, based on collection of structured information from state and local agencies with signal system management responsibilities. One hundred twenty agencies were contacted and asked to fill out a data collection instrument placed on the web. The ins
The purpose of this report is to define the elements of a comprehensive signal system asset management system (SSAMS). It builds on the results of a state-of-the-practice review of signal systems asset management, and lays the groundwork for investigating how a SSAMS could be used to evaluate alt
In order to identify the key characteristics of signal systems that should be taken into account in the development of a SSAMS, the state-of-the-practice in signal system asset management was evaluated through a literature review, agency survey, and follow-up in-depth interviews. The detailed fin
