THE DISTRIBUTION OF JOURNEY TIMES FOR VEHICLES LEAVING TRAFFIC SIGNALS

The variability in the journey times of vehicles moving from a stop-line at traffic signals to points downstream of the signals has been studied experimentally using video-tape and two-way radio techniques. The results are compared with the geometric and inverted-normal distributions previously assumed in the calculation of delay/difference of offset relations in area traffic control schemes using fixed offset progression plans. The observed journey-times did not conform well to either of the theoretical distributions studied; analysis showed that the journey-times were distributed as a pearson type 4 distribution. However, the choice of distribution appears not to be critical to the delay/difference of offset relations. /TRRL/

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  • Accession Number: 00261769
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 6 1974 12:00AM