MODELLING AND MONITORING THE PERFORMANCE OF URBAN TRAFFIC CONTROL SYSTEM
This report develops a modelling scheme within an urban traffic control (UTC) system so that its performance can be monitored on-line as part of its daily traffic operation. A review is given of the modelling techniques employed for off-line signal optimisation, on-line adaptive traffic control, and on-line performance monitoring. It suggests that a fruitful approach to on-line performance monitoring wou ld be to estimate platoon delays with a TRANSYT-like model within the framework of a control system such as SCATS. The accuracy of TRANSYT was then assessed by validation with floating-car survey data, and by a comparative study with the microscopic model NETSIM. The assessment confirms that TRANSYT modelling techniques would be appropriate for system monitoring. A scheme that makes use of the traffic flow profiles retrievable estimation, and a queue length/delay estimation procedure. This procedure models queue formation and dissipation at a stop line from the predicted arrival profile and the actual stop line departure profiles. The scheme was tested with simulated data, and with SCATS data collected in a field study. Both the queue lengths at the start of a green period, and the maximum back-of-queue that was formed as the head of a platoon joined the stationary queue at a stop line, were recorded. The results confirm the validity of the proposed scheme. The stop line flow profiles were also successfully utilized for automatic incident detection. Lane-by-lane queue length estimation was also found to be feasible. It is recommended that the scheme be employed in a control system for performance monitoring. A scenario of the future of adaptive UTC in the context of dynamic traffic management is also provided.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0869103954
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Corporate Authors:
ARRB
Melbourne, Victoria Australia -
Authors:
- Luk, JYK
- Publication Date: 1989
Media Info
- Pagination: p. 338
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Serial:
- Australian Road Research
- Volume: 19
- Issue Number: 4
- Publisher: ARRB
- ISSN: 0005-0164
Subject/Index Terms
- TRT Terms: Simulation; Traffic control; Traffic platooning; Traffic signals; Traffic simulation; Transportation corridors; Urban areas; Urban growth; Urban highways
- Geographic Terms: Australia
- Old TRIS Terms: Traffic control systems; Urban corridors
- Subject Areas: Administration and Management; Highways; Operations and Traffic Management; Planning and Forecasting; Public Transportation; Terminals and Facilities;
Filing Info
- Accession Number: 00495217
- Record Type: Publication
- ISBN: 0 86910 395 4
- Report/Paper Numbers: SR 43
- Files: TRIS
- Created Date: Jul 31 1991 12:00AM