USER COST COMPARISONS AMONG THREE TYPES OF INTERSECTION CONTROL DEVICES

THE RESULTS WERE GIVEN OF A STUDY OF ROAD USER ECONOMY AS AFFECTED BY TRAFFIC CONTROL DEVICES "AT GRADE" INTERSECTIONS. THE MOST ECONOMICAL TRAFFIC CONTROL DEVICE FOR ISOLATED, FOUR-LEG INTERSECTIONS CARRYING VARIOUS TRAFFIC VOLUMES WERE DETERMINED. ONLY TWO-LANE APPROACH STREETS WERE CONSIDERED. COSTS USED IN THE STUDY INCLUDED: (1) MOTOR VEHICLE RUNNING COSTS, (2) VALUE OF ROAD USERS' TIME, (3) ACCIDENT COSTS, (4) CAPITAL COST OF THE TRAFFIC CONTROL DEVICE, AND (5) MAINTENANCE COSTS OF THE CONTROL DEVICE. THE ANALYSIS INCLUDED THREE TYPES OF CONTROL: 2-WAY STOPS, 4-WAY STOPS, AND 2-PHASE FIXED-TIME SIGNALS. THE FINDINGS INDICATED THAT THERE WAS ALMOST NO ECONOMIC JUSTIFICATION FOR "4-WAY STOP" CONTROL. 2-WAY STOP CONTROL WAS USUALLY MOST ECONOMICAL UNTIL AN AVERAGE DAILY TRAFFIC IN THE RANGE OF 14,000-18,000 WAS REACHED. THEN A SIGNAL INSTALLATION WAS WARRANTED. THESE GENERALIZED CONCLUSIONS MIGHT NOT APPLY TO INTERSECTIONS CARRYING HIGHER VOLUMES BUT WITH A VERY UNBALANCED MAJOR-MINOR LEG TRAFFIC DISTRIBUTION OR TO OTHER UNCOMMON SITUATIONS. A METHOD FOR COMPARING INTERSECTION USER COSTS FOR VARIOUS CONTROL DEVICES WAS OUTLINED. GRAPHS WERE INCLUDED THAT MIGHT BE USED TO SIMPLIFY COMPUTATIONS AFTER DATA FOR EACH VARIABLE INVOLVED ARE OBTAINED.

  • Supplemental Notes:
    • Report Eep-8, PP 12-43, 3 FIG, 2 TAB, 26 REF, 3 APP
  • Corporate Authors:

    Stanford University

    Department of Civil Engineering
    Stanford, CA  United States  94305
  • Authors:
    • Harasyn, H
    • Dale, C
  • Publication Date: 1964-3

Subject/Index Terms

Filing Info

  • Accession Number: 00201137
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 28 1970 12:00AM