Factors Influencing Speed Profiles on Urban Streets

Motor vehicle speed profiles on urban streets are influenced by many factors including street type, environment, traffic flow, ratio of through traffic and geometric design. Special focus was given to a study of "side friction events" in the form of conflicts with pedestrians, buses, on-street parking, exits from roadside premises, etc. A bottom-up research methodology was developed and applied, which included a wide range of stationary and mobile field surveys. Controlled experiments in a driver simulator programmed to represent the studied field sites were also carried out. The results showed that crossing pedestrians, occupied roadside bus stops and encounters with vehicles in the opposing direction of travel have a significant impact on driver speed choices. In a second stage of the project a microscopic simulation model will be calibrated to represent the observed driver behavior on different types of arterials and streets. The model will then be used to produce speed patterns and speed flow relationships for the studied range of street types and conditions, which will assist traffic planners and engineers in the design and traffic management of urban streets that will be more functional for their purpose as well as safer for their respective users.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 18p
  • Monograph Title: 3rd International Symposium on Highway Geometric Design, June 29-July 1, 2005, Chicago, Illinois: Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01004446
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 21 2005 12:50PM