THE OVERSATURATED SIGNALIZED INTERSECTION - SOME STATISTICS

AN OVERSATURATED SIGNALIZED INTERSECTION WITH NO TURNING PERMITTED IS EXAMINED. DURING THE GREEN PHASE, DATA ON THE TIME BETWEEN ARRIVALS OF SUCCESSIVE VEHICLES AT AN INTERSECTION WITH NO BOTTLENECK HAVE BEEN COLLECTED AND ANALYZED. MEASUREMENTS WERE MADE OF ONLY THE VEHICLES IN QUEUE, I.E., VEHICLES THAT WERE STOPPED DURING THE RED PHASE AND THOSE THAT WERE STOPPED DURING THE GREEN PHASE BECAUSE THE STARTING WAVE HAD NOT TRAVELED BACK FAR ENOUGH. MEASUREMENTS WERE MADE ONLY ON WEEKDAYS FROM APPROXIMATELY 7:00 A.M. TO 8:45 A.M. IN ORDER TO RESTRICT THE SAMPLE, AS FAR AS POSSIBLE, TO COMMUTERS. IT IS SHOWN THAT SHIFTED ERLANG DENSITY FUNCTIONS FIT THE DATA SATISFACTORILY AND THAT ALL VEHICLES FROM THE THIRD ON MAY BE CONSIDERED AS MEMBERS OF THE SAME POPULATION WITH DIFFERENT MEANS. THE MEAN ARRIVAL TIMES DECREASE FROM FRONT TO REAR WITH ALL FROM THE SEVENTH ON BEING THE SAME. IN ADDITION, THE STATISTICAL ANALYSIS LEADS TO THE HYPOTHESIS THAT ALL INTERARRIVAL TIMES ARE INDEPENDENT. EXPERIMENTAL TECHNIQUES AND STATISTICAL METHODS ARE DESCRIBED./AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1767714
• Supplemental Notes:
  • Vol 2, No 4, PP 340-361
• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Civil Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Ancker, C J
  • Gafarian, A V
  • Gray, R K
• Publication Date: 1968-11

Media Info

• Serial:
  • Transportation Science
  • Publisher: Institute for Operations Research and the Management Sciences (INFORMS)
  • ISSN: 0041-1655
  • Serial URL: http://transci.journal.informs.org/

Subject/Index Terms

• TRT Terms: Highway capacity; Intersections; Motor vehicles; Percent saturation; Statistical analysis; Traffic signals
• Uncontrolled Terms: Intersection capacity
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225469
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 22 1994 12:00AM