AN EVALUATION OF SIGNALIZED INTERSECTION SYSTEM ANALYSIS TECHNIQUES

A system of signalized intersections is defined as two or more signalized intersections that are closely spaced--under 1,500 ft (457 m)--together. Because many factors influence interrupted flow through a system of intersections, it is important that the best technique be utilized for analyzing a system of intersections. This report evaluates techniques for the design and analysis of a system of signalized intersections. As a case study, a grid system of eight signalized intersections located in downtown Boston, Massachusetts, was chosen. These eight closely spaced intersections provide an ideal condition for testing the analysis tools' ability to predict all the available information related to delays, queue length, saturation flow rates, and other measures of effectiveness. The report compares several analysis techniques and their predicted and observed results for the eight observed network intersections. Evaluation includes testing how well these techniques predict delays, queue lengths, queue spillback, and levels of service. In addition, sensitivity analyses are performed to evaluate the limitations of these techniques. Finally, the report determines how efficiently each analysis technique performed on the signalized intersection system. In addition, the report spells out the requirements for an "acceptable technique" to aid in the design and evaluation of signalized intersection systems.

Language

  • English

Media Info

  • Pagination: 16p

Subject/Index Terms

Filing Info

  • Accession Number: 00770184
  • Record Type: Publication
  • Report/Paper Numbers: Publication No. CD-006
  • Files: TRIS
  • Created Date: Oct 14 1999 12:00AM