ESTIMATING SPEED SAMPLES

MANY TRAFFIC STUDIES REQUIRE THE COLLECTION OF A SAMPLE OF SPEEDS IN ORDER TO ESTIMATE A SPECIFIED POPULATION SPEED PARAMETER. IT IS CRUCIAL TO THE VALIDITY OF THE STUDY THAT THE SIZE OF THE SAMPLE OF SPEEDS COLLECTED SHOULD BE LARGE ENOUGH FOR THE POPULATION SPEED PARAMETER TO BE ESTIMATED FROM THE SAMPLE STATISTIC WITH THE REQUIRED AND PREDETERMINED ACCURACY. IT IS ALSO DESIRABLE THAT EXCESSIVELY LARGE SAMPLE SIZES SHOULD NOT BE COLLECTED. THIS PAPER PRESENTS A PROCEDURE WHEREBY VEHICLE SPEED SAMPLE SIZES MAY BE RELIABLY ESTIMATED DIRECTLY FROM THE DEGREE OF CURVATURE OF THE HIGHWAY LOCATION IN QUESTION. EXAMPLES OF ITS USE ARE GIVEN. /RRL/

  • Availability:
  • Authors:
    • O'FLAHERTY, C A
    • Coombe, R D
  • Publication Date: 1971-8

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00227780
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: May 22 1972 12:00AM