Overview
SHRP2 Project L08 is developing methods and guidance on incorporating travel time reliability into Highway Capacity Manual (HCM) analyses. The main product of this project will be a guidebook that describes travel time reliability concepts for an HCM audience, provides step-by-step processes for predicting travel time reliability for freeway and urban street facilities, and illustrates example applications of the procedures. The guidebook is being written in the form of two HCM chapters that are planned to be incorporated into the online Volume 4 of the HCM 2010 (www.hcm2010.org). The first chapter will provide information that will allow typical HCM users to understand, apply, and interpret the results of the processes. The second chapter will provide more specific details of the methodologies, oriented toward researcher and HCM software developer audiences. The guidebook is also planned to be produced as a stand-alone SHRP2 report, with the first HCM chapter becoming the body of the report and the second HCM chapter becoming the appendices to the report.