OPERATIONAL EFFICIENCY EVALUATION OF SELECTED AT-GRADE INTERSECTIONS

THE EFFICIENCY OF MINOR STREETS IN INTRODUCING VEHICLES INTO A CROSSING PRIORITY-TYPE STREET THROUGH AN UNSIGNALIZED INTERSECTION HAS BEEN EVALUATED BY QUEUEING THEORY TECHNIQUES AND THE RESULTS HAVE BEEN COMPARED WITH EMPIRICAL OBSERVATIONS AT FOUR INTERSECTIONS IN WASHINGTON, D.C.. IT IS ASSUMED THAT ARRIVALS OCCUR IN A POISSON MANNER, AND APPROPRIATE QUEUEING EXPRESSIONS ARE APPLIED TO DETERMINE ARRIVAL RATE, WAITING TIME, INTERARRIVAL GAPS, AND EXPECTED TIME AND NUMBER IN SYSTEM AND QUEUE. PREDICTED VALUES ARE COMPARED WITH ACTUAL OBSERVATIONS AND FOUND IN GOOD AGREEMENT. IT WAS ALSO DETERMINED THAT AS THE NUMBER OF VEHICLES IN THE QUEUE INCREASES, THE ACCEPTABLE INTERARRIVAL GAP ON THE MAJOR STREET TENDS TO DECREASE. FINALLY, THE FOUR INTERSECTIONS ARE RANKED ACCORDING TO EFFICIENCY IN FACILITATING RIGHT AND LEFT TURNS AND THROUGH MANEUVERS. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/321/321-004a.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Quality of Traffic Service. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Surti, Vasant H
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 60-73
• Monograph Title: Highway Capacity and Quality of Service
• Serial:
  • Highway Research Record
  • Issue Number: 321
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Intersections; Merging traffic; Peak hour traffic; Queuing theory; Strategic planning; Streets; Traffic delays
• Old TRIS Terms: Minor trafficway; Queueing theory
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225888
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Dec 28 1970 12:00AM