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.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 129p
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01535756
  • Record Type: Publication
  • Report/Paper Numbers: CA14-2223, UCB-ITS-PRR-2014-2
  • Contract Numbers: 65A0405; 65-3763
  • Created Date: Aug 4 2014 10:53AM