CAPACITIES OF NARROW STREETS WITH MANUAL CONTROL AND SIGNAL CONTROL

THE CAPACITIES OF NARROW STREETS AT FORT BELVOIR, VIRGINIA, ARE REPORTED AS DETERMINED BY FIELD SURVEY OF CAPACITIES AT INTERSECTIONS. IN ADDITION TO THE OVERLOADS WHICH WERE PUSHED THROUGH FORT BELVOIR INTERSECTIONS DURING PEAK PERIODS, THERE WERE FREQUENTLY TREMENDOUS BACKLOGS OF VEHICLES UNABLE TO ENTER THE INTERSECTIONS. AT INTERSECTIONS UNDER MILITARY POLICE CONTROL, THE OVERLOADS WERE GENERALLY ACCOMPLISHED BY STRETCHING THE GO PERIOD FOR THE MAJOR FLOW TO SUCH EXTREME LENGTHS THAT CROSS TRAFFIC WAS SEVERELY PENALIZED. OF COURSE, SUCH EXCESSIVE SINGLE-CYCLE DELAYS TO CROSS TRAFFIC COULD NOT OCCUR AT INTERSECTIONS CONTROLLED BY FIXED-TIME SIGNALS, ALTHOUGH LENGTHY BACK-UPS DID OCCUR. WHILE 31 INTERSECTION APPROACHES WERE FOUND TO BE OVERLOADED IN THE PEAK 15 MINUTE PERIOD, ONLY TWO SECTIONS OF ROADWAY WERE FOUND TO BE IN URGENT NEED OF WIDENING. CAPACITY RESTRICTIONS IN THE POST ROADNET WERE DUE ALMOST ENTIRELY TO INTERSECTION DEFICIENCIES.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Tables;
  • Pagination: pp 1-15
  • Monograph Title: Effects of Traffic Control on Street Capacity
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00227846
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:36AM