TRB’s second Strategic Highway Research Program (SHRP 2) S2-L05-RW-1: Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes reviews domestic and international literature describing current research and practical use of travel-time reliability in transportation planning; summarizes results from a survey of state departments of transportation and metropolitan planning organizations about the current state-of-the-practice of using travel-time reliability in transportation planning; summarizes case studies of agencies that are incorporating reliability into their transportation planning processes; summarizes travel-time reliability performance measures, strategies for improving travel-time reliability, and tools for measuring the impacts of strategies on travel-time reliability; and describes the framework for incorporating reliability performance into the transportation planning process.
The Final Report is designed to accompany the Technical Reference that provides a “how-to” guide for technical staff to select and calculate the appropriate performance measures to support the development of key planning products and a Guide designed to help planning, programming, and operations managers apply the concept of travel-time reliability to balance investment in programs and projects.
SHRP 2 Reliability Project L05 has developed a series of case studies that highlight examples of agencies that have incorporated reliability into their transportation planning processes as well as three reliability assessment spreadsheet tools related to the case studies.