Car Following Theory Illustrated by an Example

  • R. J. Salter


  1. (a)

    Show how car following theory may be used to estimate the maximum flow of vehicles in a single stream of vehicles.

  2. (b)

    Vehicles in a traffic stream may be assumed to have an average spacing at rest of 5 m, a maximum difference in deceleration ability of 0.5 m/s2 when the preceding vehicle decelerates at 2.5 m/s2, and vehicle drivers a maximum reaction time of 1.0 s. Assuming that drivers space themselves so as to be able to stop safely should the preceding vehicle execute an emergency stop determine the maximum single lane flow and the speed at which it occurs.



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  1. 1.
    Normann, O.K. and W.P. Walker. Highway Capacity. Public Roads, Vol. 25, No. 10. October 1949.Google Scholar

Copyright information

© R. J. Salter 1989

Authors and Affiliations

  • R. J. Salter
    • 1
  1. 1.University of BradfordUK

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