Citation

Mortimer WJ. Highw. Res. Board bull. 1957; 156: 14-26.

Copyright

(Copyright © 1957, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

Many attempts have been made in the past to develop sampling techniques whereby the total volume of traffic could be estimated by sampling only a relatively small portion of the total traffic flow. One such technique was recently developed in england by wardrop and charlesworth and reported under a method of estimating speed and flow of traffic from a moving vehiclee the cook county highway department investigated this technique to test its usefulness in this country, considering only the estimation of the flow of traffic. If a large number of sections are to be sampled, with the idea of estimating the total combined volume of all sections, the method appears to be very useful, for while in any single section there may be a sizeable error, these errors appear to cancel out when sections are combined. If a fixed degree of precision is required on all sections, the sampling time will vary inversely with the volume in question. It appears, at present, that for estimating total traffic volume flow or total vehicle miles driven, this method is the fastest and may well be the most economical. Studies are underway to compare the cost of this method with other known and accepted methods.