IMPLICATIONS OF CHANGES IN THE UNSIGNALIZED INTERSECTION PROCEDURE ON ACCESS MANAGEMENT

The goal of access management is to reduce the accident rate and improve the flow and speed of traffic on a highway system. Numerous research studies have consistently shown that the more access points per mile, the higher the accident rate. Access management techniques reduce the number of conflict points. Therefore, it is logical for accident rates to be lowered as the average distance between access points increases. This paper looks at current proposals for changing the unsignalized capacity analysis procedures that include: modifying the conflicting volume formulas; modifying base critical gaps, move-up times; using adjustment procedures, including new procedure for estimating capacity with a raised or striped median or two-way left-turn lane on a major street; adding a flared approach analysis; and expanding progression signalization analysis.

• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  National Institute for Advanced Transportation Technology

  University of Idaho, Moscow
  115 Engineering Physics Building
  Moscow, ID  United States  83844-0901

  TransNow, Transportation Northwest

  University of Washington, Department of Civil Engineering
  129 More Hall, Box 352700
  Seattle, WA  United States  98195-2700
• Authors:
  • Ismart, D
• Conference:
  • Third International Symposium on Intersections Without Traffic Signals
  • Location: Portland, Oregon
  • Date: 1997-7-21 to 1997-7-23
• Publication Date: 1997-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 136-140

Subject/Index Terms

• TRT Terms: Access control (Transportation); Psychological conflict; Safety; Signalized intersections; Traffic flow; Traffic safety; Traffic speed; Unsignalized intersections
• Uncontrolled Terms: Access control
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control;

Filing Info

• Accession Number: 00741184
• Record Type: Publication
• Files: TRIS, TRB, USDOT
• Created Date: Oct 28 1997 12:00AM