UPSTREAM EISENHOWER EXPRESSWAY RAMP CONTROL

THIS REPORT SUMMARIZES THE OPERATIONAL EFFECTS PRODUCED BY METERING NINE CONSECUTIVE ENTRANCE RAMPS ALONG AN EIGHT MILE SECTION OF THE OUTBOUND EISENHOWER EXPRESSWAY. THE MAJOR FINDING OF THE STUDY IS THAT RAMP METERING MAY NOT BE ABLE TO ELIMINATE FREEWAY CONGESTION THAT IS CAUSED BY EXPRESSWAY GEOMETRICS. ALSO, RAMP METERING CAN CAUSE DETERIMENTAL EFFECTS TO THE SURFACE STREET SYSTEM IF EXCESSIVE QUEUES ARE FORMED AT THE ENTRANCE RAMPS. THE STUDY ALSO POINTS OUT THE NEED TO AVOID BEFORE AND AFTER STUDIES WHICH DO NOT TAKE INTO ACCOUNT THE SEASONAL VARIATIONS IN TRAFFIC DEMANDS. /BPR/

• Supplemental Notes:
  • Hpr, Bpr-ihR-88
• Corporate Authors:

  Illinois Department of Transportation

  Division of Highways, 2300 South Dirksen Parkway
  Springfield, IL  United States  62764

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • McDermott, J M
• Publication Date: 1967-4

Subject/Index Terms

• TRT Terms: Before and after studies; Expressways; Geometric design; Interchange ramps; Seasons; Traffic congestion; Traffic control
• Uncontrolled Terms: Seasonal variations
• Old TRIS Terms: Freeway entrances and exits; Freeway ramps; Metering
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00224864
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Dec 21 1994 12:00AM