Coordination of Freeway Ramp Meters and Arterial Traffic Signals Field Operational Test (FOT)

The objective of this project was to develop a practical coordination strategy between one freeway ramp meter and one arterial intersection traffic signal and conduct a field operational test. The project team successfully accomplished all proposed tasks. The project started with a literature review, development of a Concept of Operations (ConOps) document, site selection criteria based on several factors, and systematic data collection. The collected data was then used to calibrate a microscopic traffic system modeling using Aimsun, which is used to simulate the field operation test results prior to deployment. After achieving positive results in the simulation modeling, the coordination algorithm were then deployed in the field. The ramp meter 2070 controller running URMS (Universal Ramp Metering System) and the signal 2070 controller were linked and then coordinated. Traffic data before and after the deployment was collected and analyzed. The test data analysis showed a net delay reduction at Taylor Street Intersection by 7%. The analysis also showed a better use of the entrance ramp storage with higher flow to the entrance ramp while avoiding queue overspill. In addition, the analysis found that the freeway mainline traffic conditions immediately upstream of the entrance ramp remained unchanged by such coordination. Due to the success of the coordination between one intersection and one ramp meter, it may be worthwhile to coordinate a freeway corridor comprised of multiple ramps and arterial signals.

• Record URL:
  https://dot.ca.gov/-/media/dot-media/programs/research-innovation-system-information/documents/f0017180-final-report-task-2223-a11y.pdf
• Record URL:
  https://merritt.cdlib.org/api/presign-file/ark%253A%252F13030%252Fm5qv51q7/2/producer%252FCA14-2223.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/883449047
• Corporate Authors:

  University of California, Berkeley

  California PATH Program, Institute of Transportation Studies
  Richmond Field Station, 1357 South 46th Street
  Richmond, CA  United States  94804-4648

  California Department of Transportation

  1227 O Street
  Sacramento, CA  United States  95843

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Lu, Xiao-Yun
  • Su, Dongyan
  • Spring, John
• Publication Date: 2013-12-31

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 129p
• Serial:
  • PATH Research Report
  • Publisher: University of California, Berkeley
  • ISSN: 1055-1425

Subject/Index Terms

• TRT Terms: Algorithms; Arterial highways; Before and after studies; Field tests; Freeways; Literature reviews; On ramps; Ramp metering; Traffic delays; Traffic signal control systems; Traffic simulation
• Geographic Terms: California
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01535756
• Record Type: Publication
• Report/Paper Numbers: CA14-2223, UCB-ITS-PRR-2014-2
• Contract Numbers: 65A0405; 65-3763
• Files: PATH, CALTRANS, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Aug 27 2014 10:50AM