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
