RELATIONSHIP BETWEEN THE PROPORTION OF FREE VEHICLES AND FLOW RATE ON ARTERIAL ROADS

Accurate assessment of the performance of a road network is dependent on the modelling of parameters describing the traffic flow. Current methods for describing the proportion of free vehicles on a road link use a linear relationship with the vehicle flow rate. An exponential relationship proposed by Brilon is examined. Analysis of both relationships indicates the exponential model is better suited to the modelling of the proportion of free vehicles. The relationships differed depending on the lane type being modelled, with the kerb lane sustaining a higher proportion of free vehicles than the median lane for the same flow rate. The finding is significant in the analysis of priority intersections. The difference is attributed to driver behaviour and is related to the ease of overtaking. The exponential models found for each lane can then be used to model the proportion of free vehicles on a road link at a large distance from an intersection. (a)

  • Availability:
  • Corporate Authors:

    Queensland University of Technology

    School of Civil Engineering
    Brisbane,   Australia 
  • Authors:
    • Sullivan, D
    • Troutbeck, R
  • Publication Date: 1993-11

Language

  • English

Media Info

  • Features: References;
  • Pagination: 42 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00662169
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Jul 28 1994 12:00AM