The results of some preliminary investigations into the noise emitted by road vehicles under various operating conditions are presented. The operating parameters considered are engine speed, road speed, gear ratio, acceleration and pay load. The information obtained is then used to illustrate the effect of some simple traffic control situations. Results from a 9 1/2 ton truck and a 1500 sq. cm car are presented and it is shown that noise at constant speed increases at a mean rate of 12 dBA per doubling of speed. When the vehicle is accelerating this rate of increase is much reduced, although the maximum levels are similar to those obtained when the vehicle is running at constant speed. The other parameters are found to have only a secondary effect. The conclusions, in terms of road planning, are that limiting speed and smoothing traffic flow have a beneficial effect on noise. High levels of noise can be generated by vehicles accelerating away from a road intersection for a distance up to 700-1000 feet even in the presence of a 30 m.p.h. speed limit.

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  • Corporate Authors:

    Academic Press Incorporated

    Berkeley Square House, Berkeley Square
    London W1,   England 
  • Authors:
    • Waters, P E
  • Publication Date: 1970

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Filing Info

  • Accession Number: 00261092
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 22 2003 12:00AM