Refining the Real-Timed Urban Mobility Report

The Texas Transportation Institute (TTI) is considered a national leader in providing congestion and mobility information. The Urban Mobility Report (UMR) is the most widely quoted report on urban congestion and the associated costs in the nation. The report measures system delay, wasted fuel, and the annual cost of congestion in all U.S. urban areas. In 2011, researchers also produced the Congested Corridors Report (CCR) which focused on traffic congestion along 328 corridors across the U.S. The CCR is the first report to include travel reliability statistics on a nationwide basis. In recent years, the UMR/CCR researchers partnered with a private-sector historical speed provider—INRIX—to obtain nationwide speed data to generate the best possible estimate of mobility conditions across the nation. The data that are available from this partnership continue to allow the UMR/CCR methodology to evolve. While much more is understood about freeway operations and mobility, the INRIX data are allowing researchers to take a closer look at arterial street operations and mobility. This report describes a methodological improvement in the UMR arterial street congestion calculations, including a change in the definition of “free-flow speed,” which is used for delay calculations on arterial streets. This research improves the estimates of congestion and its costs, and maintains TTI’s position as the most authoritative source of mobility and congestion information.

• Record URL:
  http://utcm.tamu.edu/publications/final_reports/Lomax_11-06-73.pdf
• 
• Supplemental Notes:
  • This research was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  University Transportation Center for Mobility

  Texas Transportation Institute, Texas A&M University System
  College Station, TX  United States  77843-3135

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Lomax, Tim
  • Turner, Shawn
  • Eisele, Bill
  • Schrank, David
  • Geng, Lauren
  • Shollar, Brian
• Publication Date: 2012-3

Language

• English

Media Info

• Media Type: Web
• Edition: Final Report
• Features: Appendices; Figures; Maps; References; Tables;
• Pagination: 204p

Subject/Index Terms

• TRT Terms: Arterial highways; Costs; Highway corridors; Mobility; Statistics; Traffic congestion; Traffic data; Traffic delays; Urban areas
• Geographic Terms: United States
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning; I73: Traffic Control;

Filing Info

• Accession Number: 01375244
• Record Type: Publication
• Report/Paper Numbers: UTCM 11-06-73
• Contract Numbers: DTRT06-G-0044 (Grant)
• Files: UTC, TRIS, ATRI, USDOT
• Created Date: Jul 11 2012 8:44AM