UNCONDITIONALLY PREEMPTIVE BUS PRIORITY SYSTEM: SUMMARY OF SIMULATION RESULTS

A large number of simulation runs of an urban network traffic model have been used to evaluate a Bus Priority System (BPS) algorithm that automatically grants a green signal to buses as they approach an intersection. BPS was found to provide substantial travel time improvements (20 to 30 percent) to buses in local service (frequent stops) at all headways, to buses in limited service (infrequent bus stops), and to express service (no bus stops) at headways of one minute and less. The disrupting effect of BPS on cross-street traffic is much less when far-side bus stops instead of near-side bus stops are used. The use of BPS also reduced the delaying effect of buses on other bus-street traffic. For all conditions tested, total passenger travel time per hour of system operation improved when BPS was used.

• Corporate Authors:

  Mitre Corporation

  Westgate Research Park
  McLean, VA  United States  22101

  Urban Mass Transportation Administration

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Ludwick Jr, J C
• Publication Date: 1975-7

Media Info

• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Bus priority; Buses; Highway traffic control; Intersections; Mathematical models; Networks; Simulation; Time; Traffic control; Traffic engineering; Traffic signals; Transportation; Transportation operations; Travel; Travel time; Urban areas; Urban transportation
• Uncontrolled Terms: Transportation management; Transportation models
• Old TRIS Terms: Traffic control systems
• Subject Areas: Operations and Traffic Management; Planning and Forecasting; Transportation (General);

Filing Info

• Accession Number: 00093938
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: MTR-6986, UMTA-VA-06-0026-75-1
• Contract Numbers: DOT-UT-50016
• Files: NTIS, TRIS, USDOT
• Created Date: Mar 10 1981 12:00AM