Distance Requirements for Ramp Metering

Details

• Creators:
  Sharma, Sameer ; Messer, Carroll J.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Transfer Office ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Freeways Guidelines Merging Traffic Methodology On Ramps Queuing Ramp Metering Signals Urban Transportation
• Publication/ Report Number:
  FHWA/TX-95/1392-5
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas ; United States
• Edition:
  Interim: September 1, 1993 - August 31, 1994
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  Freeway ramp metering systems are being used to alleviate urban freeway congestion. This report presents a methodology for determining the distance requirements for ramp metering for a wide range of traffic volume and freeway geometric conditions. The distance requirement for ramp metering consists of distance required for queue storage and distance required for the freeway merging operation. A queue storage model has been developed to determine distance required for queue storage. The constant acceleration models of linear motion have been used to determine distance required for the freeway merging operation. A methodology for determining the optimal placement of the ramp meter signal has been presented. Guidelines for effecting a trade-off between queue storage and freeway merging distance requirements have also been presented. A sample problem demonstrates the use of the presented methodology.
• Format:
  PDF
• Funding:
  0-l392
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:db1caf00ad67c49c4bddc26c59671313920a3e2862760c801315311e61c9906f06041f29222595417c640df7541b900c832e304bc5fd31b9bdd6c9f6d970e264
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/82687/dot_82687_DS1.pdf
• File Type:
  [PDF - 691.17 KB ]