IMPLEMENTATION OF ON-LINE ZONE CONTROL STRATEGIES FOR OPTIMAL RAMP METERING IN THE MINNEAPOLIS RING ROAD

This paper presents the results from field implementation of gain scheduling in a feedforward/feedback zonal control system. An optimisation algorithm determines the zone-optimal gains based on feedback from the performance of the closed-loop freeway system. Because the parameters adapt to traffic conditions in a closed loop, the new system is closer to being adaptive. The system is a practical alternative to advanced theoretical concepts of freeway corridor control and can be integrated with the gain scheduling currently available at traffic management centres. The method is outlined and its application to a 6.2 mile section of the Minneapolis Ring Road described. The results show 21% more cars entering by the ramps together with a 31% reduction in total travel time. For the covering abstract see IRRD 865401.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 181-4

Subject/Index Terms

Filing Info

  • Accession Number: 00668601
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Nov 16 1994 12:00AM