EFFECT OF HETEROGENEITY OF TRAFFIC ON DELAY AT SIGNALIZED INTERSECTIONS

An important criterion in the evaluation of performance of signalized intersections is the average delay caused to vehicles. Various models can estimate delay to traffic at signalized intersections; however, these models are based on homogeneous traffic conditions. Hence, these models may not be appropriate under heterogeneous traffic conditions. A probabilistic technique based on first-order second-moment method has been adopted to predict the saturation flow and the delay caused to traffic at signalized intersections under heterogeneous traffic conditions. In this paper, the modified 1958 Webster model is the foundation into which the interaction between different vehicle types is incorporated via intercorrelation between different vehicle groups. Investigators conducted extensive traffic surveys to acquire the input data necessary for these models as well as the data required to validate the calculated values. The probabilistic approach yielded results that were close to the observed values of delay.

Language

  • English

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Filing Info

  • Accession Number: 00711536
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Sep 13 1995 12:00AM