REPORT OF COMMITTEE ON HIGHWAY TRAFFIC ANALYSIS

A THREE-LANE TWO-WAY ROADWAY IS UPON WHICH THE TRAFFIC MOVEMENTS ARE IN BOTH DIRECTIONS, AND WHICH IS ONLY WIDE ENOUGH FOR THREE MOVING VEHICLES TO BE ABREAST. THE ACTUAL TRAFFIC CAPACITY OF A TWO-LANE ROADWAY VARIES WITHIN WIDE LIMITS. IT IS EVIDENT THAT A THREE-LANE ROADWAY WILL PERMIT VEHICLES TO PASS EACH OTHER WITH GREATER FREQUENCY THAN ON A TWO-LANE ROAD. THE THREE-LANE ROADWAY, HOWEVER, PROVIDES CONDITIONS UNDER WHICH ACCIDENTS MAY FREQUENTLY OCCUR. THE COMMITTEE RECOMMENDS THE USE OF A FOUR-LANE ROADWAY WHEN THE CAPACITY OF THE TWO-LANE TWO-WAY ROADWAY IS EXCEEDED. THE MOVEMENT OF TRAFFIC OVER ANY ROUTE DEPENDS UPON ITS ABILITY TO MOVE FREELY AT ALL POINTS. THE COMMITTEE BELIEVES THAT THE ELIMINATION OF OBSTACLES TO TRAFFIC ON MANY HIGHWAY ROUTES WILL BE JUSTIFIED BY THE INCREASE IN THE SAFE MOVEMENT OF TRAFFIC: AND IN SOME CASES, THE PROGRAM OF WIDENING CAN BE ECONOMICALLY DEFERRED BY THIS METHOD. THE COMMITTEE RECOMMENDS, IN THE CONSTRUCTION PROGRAM FOR HIGHWAY IMPROVEMENT, THAT THERE SHALL BE SERIOUSLY CONSIDERED THE PLANNING FOR ARTERIAL HIGHWAYS OUTSIDE THE CONGESTED AREAS. THE COMMITTEE IS OF THE OPINION THAT, IN MANY CASES, THE INSTALLATION OF A FIXED SIGNAL SUPPORTED BY A PEDESTAL AT THE INTERSECTION IS NOT JUSTIFIED. THE COMMITTEE RECOMMENDS THE FOLLOWING: (1) DETERMINATION OF PRESENT RIGHT-OF-WAY, (2) A HIGHWAY TRANSPORT SURVEY TO DETERMINE NECESSARY REQUIRED WIDTHS, (3) ACQUISITION OF ADDITIONAL NECESSARY WIDTH, (4) SIMPLIFICATION OF METHOD OF ACQUISITION TO PERMIT IMMEDIATE OCCUPANCY. THE TYPE OF PAVEMENT SHOULD BE BASED ON THE CHARACTER AND VOLUME OF TRAFFIC.

  • Supplemental Notes:
    • Vol 5, Pt1, PP188-192
  • Authors:
    • Hamlin, G E
  • Publication Date: 1926

Media Info

  • Monograph Title: Proceedings of the Fifth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 3-4, 1925. Part I: Reports of Research Committees and of Special Investigations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00200401
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 9 1970 12:00AM