Overview
This report discusses the application of travel time data and statistics to travel time reliability analyses. It covers topics such as data sources for reliability, data processing methods, case studies comparing reliability measures, and the conclusions drawn from the analysis. The page includes various figures and tables detailing data processing steps and results. The document appears to be a technical guide, primarily focusing on travel time reliability in transportation systems, published by the Federal Highway Administration in July 2023. View the report at: https://ops.fhwa.dot.gov/publications/fhwahop21058/
There is also a fact sheet available that discusses the importance of travel time reliability in the transportation system. Travel time reliability is vital for travelers because unexpected delays can disrupt their plans. It emphasizes that reliability impacts economic competitiveness, especially for freight movements, and introduces the concept of "planning time index" (PTI) and other reliability measures that describe the variability and uncertainty of travel times. The page also touches on data sources for reliability measurements, comparing different data types, and their implications for measuring reliability. It highlights the importance of vehicle trajectory data and provides insights into future efforts for improving travel time reliability measurements, including data processing procedures and exploring trip-based reliability measures. View the fact sheet at: https://ops.fhwa.dot.gov/publications/fhwahop22086/