A STUDY OF TRAFFIC FLOW AT ARTERIAL STREET INTERSECTIONS

AN ATTEMPT WAS MADE TO OBTAIN A MORE PRECISE MEASURE OF THE EFFECTS OF LEFT TURNS AND COMMERCIAL VEHICLES ON TRAFFIC FLOW AT ARTERIAL STREET INTERSECTIONS. THE FIELD STUDIES WERE PERFORMED DURING PEAK HOURS AT SELECTED INTERSECTIONS, EACH APPROACH DIFFERING FROM THE PREVIOUS ONE BY ONLY ONE SIGNIFICANT FACTOR. THE VARIATION IN AVERAGE HEADWAY OR DISCHARGE VOLUME AS THE PERCENTAGE OF LEFT TURNS VARIES THROUGHOUT AN HOUR & FROM ONE APPROACH TO ANOTHER INDICATES THAT TRAFFIC FLOW DATA SHOULD BE ANALYZED FROM SHORTER PERIODS THAN AN HOUR IN ORDER TO DETERMINE THE AMOUNT AND CAUSE OF CONGESTION. THE RELATIONSHIP BETWEEN CAPACITY AND THE PERCENTAGE OF LEFT TURNS APPEARS TO BE NON-LINEAR BUT SHOULD BE INVESTIGATED FURTHER BEFORE DEFINITE CONCLUSIONS ARE DRAWN.

• Supplemental Notes:
  • 36pp, 7fig, 12TAB, 2APP
• Corporate Authors:

  Chicago Area Transportation Study

  300 West Adams Street
  Chicago, IL  United States  60606
• Authors:
  • Carter, Everett C
• Publication Date: 1962-3-23

Subject/Index Terms

• TRT Terms: Arterial highways; Commercial vehicles; Field studies; Highway capacity; Intersections; Left turns; Measurement; Peak hour traffic; Streets; Traffic congestion; Traffic flow; Vehicle capacity; Vehicles
• Old TRIS Terms: Average headway /vehicle/
• Subject Areas: Highways; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00225101
• Record Type: Publication
• Source Agency: Urban Transp Plng Abstracts /Prelim
• Files: TRIS
• Created Date: Aug 25 1994 12:00AM