Theoretical Basis of the Moving Car Observer Method

  • R. J. Salter


Show how the space mean speed of a traffic stream and the flow may be estimated by an observer travelling with, and against the traffic stream. Prove any formulae which are used. The following observations were taken by an observer travelling with and against the traffic stream; calculate the mean traffic stream speed and also the flow.


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  1. (1).
    J.G. Wardrop and G. Charlesworth. A method of estimating speed and flow of traffic from a moving vehicle. J, Inst. Civ. Engs 3 (Part 2) 1954. 158–171.Google Scholar

Copyright information

© R. J. Salter 1989

Authors and Affiliations

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

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