Guide to Establishing Monitoring Programs for Travel Time Reliability

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-L02-RR-2: Guide to Establishing Monitoring Programs for Travel Time Reliability describes how to develop and use a Travel Time Reliability Monitoring System (TTRMS).

The guide also explains why such a system is useful, how it helps agencies do a better job of managing network performance, and what a traffic management center (TMC) team needs to do to put a TTRMS in place.

SHRP 2 Reliability Project L02 has also released Establishing Monitoring Programs for Travel Time Reliability, that describes what reliability is and how it can be measured and analyzed, and Handbook for Communicating Travel Time Reliability Through Graphics and Tables, offers ideas on how to communicate reliability information in graphical and tabular form.

A related paper in TRB’s Transportation Research Record, “Synthesizing Route Travel Time Distributions from Segment Travel Time Distributions,” examines a way to synthesize route travel time probability density functions (PDFs) on the basis of segment-level PDFs in Sacramento, California.