IMPROVING ROAD LINK SPEED ESTIMATES FOR AIR QUALITY MODELS

A methodology developed to improve travel speed estimates for air quality modeling is described. The proposed methodology, which is applied after the traffic assignment process, consists of an arterial module and a freeway module. It modifies speeds through the use of a new set of congestion functions based on the Davidson formulation, a modified version of the Dowling and Skabardonis postprocessor methodology, and a modified version of Boston's Central Artery/Tunnel freeway queuing procedure. The methodology was applied to the greater Toronto area, and the arterial module of the methodology was validated by using observed speed data from the region. The model improved average travel speed estimates for arterial roads significantly compared with those calculated from the transportation planning model.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 71-78
  • Monograph Title: Transportation environmental issues: air, noise, water, mitigation processes, and alternative fuels
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00674203
  • Record Type: Publication
  • ISBN: 0309060508
  • Files: TRIS, TRB, ATRI
  • Created Date: Jan 31 1995 12:00AM