SOME THEORETICAL ASPECTS OF ROAD TRAFFIC RESEARCH

THE DISTRIBUTION OF SPEED OR VELOCITY IN TIME IS COMPUTED ASSUMING THAT THE TRAFFIC STREAM IS COMPOSED OF A NUMBER OF SUBSIDIARY STREAMS WITH VEHICLES IN THE SUBSIDIARY STREAMS TRAVELING AT THE SAME SPEED AND FORMING A RANDOM SERIES. THE MATHEMATICAL THEORY IS DEVELOPED IN THE RANDOM SERIES FORM WITH MEAN SPEED AND JOURNEY TIME AS VARIABLES. CAPACITY USED IS DEFINED AS THE FLOW WHICH PRODUCES THE MINIMUM ACCEPTABLE AVERAGE JOURNEY SPEED FOR A GIVEN RELATIONSHIP BETWEEN SPEED AND FLOW. DELAY AND CAPACITY ARE DISCUSSED IN SIGNALS AND IT IS SHOWN THAT THE SHORTEST PRACTICABLE CYCLE DOES NOT NECESSARILY RESULT IN THE MINIMUM AVERAGE DELAY, AND THAT THE RANDOMNESS OF TRAFFIC CAN CAUSE VERY LONG DELAYS AT TRAFFIC SIGNALS. BEFORE AND AFTER STUDIES ARE DISCUSSED WITH THE RELEVANT STATISTICAL TREATMENT.

Media Info

  • Serial:
    • Issue Number: 0

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Filing Info

  • Accession Number: 00227735
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:36AM