MEASURES OF THE SENSITIVITY AND EFFECTIVENESS OF THE CORQ TRAFFIC MODEL

The traffic simulation model on corridor queuing, CORQ, was tested and used to predict the effects of some alternative traffic control schemes designed to relieve and bottleneck on the Ottawa Queensway. For each control scheme CORQ predicted the link flows and queues as well as the total travel time for the entire Queensway corridor. The corridor was modeled as a network of nodes and links. Demands were represented by a set of origin-destination matrices corresponding to a sequence of 15-min time sections, each of which had assumed time-stationary demand rates. The CORQ model assigned these demands to the network and was found to reproduce measured flows and queues reasonably will. It then was calibrated to measured values and used to predict the flows, queues, and total travel time for each of the various control schemes. The model was found to be sensitive to a variety of strategies including the metering or closure or both of freeway ramps, revised red-green splits at traffic signals, and restriping or channelization. In this particular application, CORQ predicted that the closure of a certain off ramp would have the greatest single effect on total network travel time. CORQ does not account for the feedback effect on corridor origin-destinaton demands because of new operating conditions caused by traffic controls. The user is left to alter the origin-destinationmatrices to account for those demand changes that he or she feels are required.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 38-48
  • Monograph Title: Measures of effectiveness, railroad-highway grade crossings and visibility
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00134867
  • Record Type: Publication
  • ISBN: 0309024722
  • Files: TRIS, TRB
  • Created Date: Sep 4 1976 12:00AM