Add to ORKGDTFH61-16-D-00051This project developed a handbook and supporting materials for working with travel time data in the development of travel time reliability performance assessment and reporting. The intent of the handbook is twofold: to provide practitioners with the ability to understand the differences in reliability measures derived from the different data sources and to document the steps needed to turn high-resolution travel time data into reliability performance measures. The handbook covers several topics including: data sources for reliability; data processing methods for reliability; and creating and comparing reliability measures, highlighting differences and similarities in the use of data from different sources. A case study was ...