AN ECONOMY STUDY OF THE TRAFFIC-PACER SYSTEM OF SIGNAL OPERATION

A PRELIMINARY TEST WAS MADE OF THE ECONOMIC JUSTIFICATION FOR THE TRAFFIC PACER SYSTEM WHICH SYSTEM SLOWS VEHICLES RATHER THAN STOPPING THEM AT INTERSECTIONS. COMPARISONS, BASED ON SIGNAL INSTALLATION AND ROAD USER COSTS BETWEEN (1) NON-COORDINATED SIGNALS AND THE TRAFFIC PACER AND (2) COORDINATED SIGNALS AND THE TRAFFIC PACER, WERE MADE. SOLUTIONS EMPLOYED THE "RATE OF RETURN METHOD". THE TRAFFIC PACER SYSTEM DIFFERS FROM THE USUAL "PROGRESSIVE" TRAFFIC CONTROL SYSTEM IN THAT (1) SPEED SIGNALS ARE INSTALLED AT INTERVALS AHEAD OF EACH INTERSECTION TO INDICATE TO DRIVERS HOW FAST TO TRAVEL TO ARRIVE AT THE INTERSECTION DURING THE GREEN LIGHT INTERVAL; THUS FEWER VEHICLES ARE STOPPED, AND (2) THOSE VEHICLES WHICH STILL MUST STOP BECAUSE THEY WOULD REACH THE INTERSECTION DURING THE RED LIGHT INTERVAL ARE HALTED BEFORE THEY REACH THE INTERSECTION. THEY START AGAIN IN TIME TO REACH THE SIGNAL WHEN IT IS GREEN AND AT TRAVEL SPEED RATHER THAN STARTING SPEED; PURPORTEDLY INCREASING INTERSECTION CAPACITY. THE ECONOMY STUDY INDICATED THAT THE EXPENDITURE OF PUBLIC FUNDS FOR MORE ELABORATE TRAFFIC CONTROL MEASURES SUCH AS THE TRAFFIC PACER WAS WELL JUSTIFIED BY USER SAVINGS. THE ANALYSIS DISCLOSED THAT THE PROGRESSIVE SYSTEM PRODUCED A HIGHER MAXIMUM VEHICLE SPEED AND SMALL TIME-SAVING OVER THE TRAFFIC PACER. THE TRAFFIC PACER HAD GREAT ECONOMIC SUPERIORITY BECAUSE ITS MORE NEARLY UNIFORM DRIVING SPEEDS SUBSTANTIALLY LOWERED OPERATING COSTS.

  • Supplemental Notes:
    • Rept Eep-8, PP 63-74
  • Corporate Authors:

    Stanford University

    Department of Civil Engineering
    Stanford, CA  United States  94305
  • Authors:
    • Hulbert, T L
  • Publication Date: 1964-3

Subject/Index Terms

Filing Info

  • Accession Number: 00201135
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 28 1970 12:00AM