00626854

Component

http://onlinepubs.trb.org...trr/1992/1365/1365-015.pdf

https://scholar.google.co...Bell&publication_year=1992

It is generally accepted that there is a need to develop traffic models to manage and control congestion in real time. This control needs to be integrated with route guidance systems in order to achieve rerouting. A basic requirement of such models is to automatically establish turning movements from link flows. Conventional models such as entropy maximizing and information minimizing have been developed for use off line for transportation planning and are not suitable for application on line. A novel approach is proposed that uses linear programming to forecast traffic congestion in an urban network and define junction turning flows. The algorithms, originally developed for optimizing flows of water and electricity, use detector flow measurements, weighted links, and constrained upper and lower flow bounds. The principles underlying this approach are explained. The development, calibration, validation, and implementation of the model in a real network in the city of Leicester, England, are described. The results show that turning movements can be predicted with sufficient accuracy to justify further work, in particular to carry out a demonstration of the application of the algorithm on street.

This paper appears in Transportation Research Record No. 1365, Highway Capacity and Traffic Flow. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01404949

English

p. 147-154

1992

Transportation Research Record

0309054044

Figures (7) ; References (11)

Algorithms; Calibration; Development; Forecasting; Highway traffic control; Implementation; Linear programming; Link volume; Networks; Real time control; Real time data processing; Route guidance; Traffic congestion; Traffic simulation; Turning traffic; Urban areas; Urban highways; Validation

Link flows; Transportation networks; Turning movements

Leicester (England)

Highways; Operations and Traffic Management; Research; I71: Traffic Theory

TRIS, TRB

Feb 17 1993 12:00AM

• CAPACITY OF TWO-LANE, TWO-WAY RURAL HIGHWAYS: THE NEW APPROACH
• CAR-FOLLOWING MODEL BASED ON FUZZY INFERENCE SYSTEM
• DEVELOPMENT OF AN IMPROVED HIGH-ORDER CONTINUUM TRAFFIC FLOW MODEL
• EMPIRICAL METHOD TO ESTIMATE THE CAPACITY AND DELAY OF THE MINOR STREET APPROACH OF A TWO-WAY STOP-CONTROLLED INTERSECTION
• IMPLEMENTING TRAVEL FORECASTING WITH TRAFFIC OPERATIONAL STRATEGIES
• INVESTIGATION OF THE IMPACTS OF RAMP METERING ON TRAFFIC FLOW WITH AND WITHOUT DIVERSION
• LEFT-TURN ADJUSTMENT FACTORS FOR SATURATION FLOW RATES OF SHARED PERMISSIVE LEFT-TURN LANES
• MODELING QUEUED DRIVER BEHAVIOR AT SIGNALIZED JUNCTIONS
• OVERSATURATION DELAY ESTIMATES WITH CONSIDERATION OF PEAKING
• POTENTIAL ACCURACY OF A PLANNING APPLICATION FOR THE HCM SIGNALIZED INTERSECTION OPERATIONAL PROCEDURE
• SIGNAL TIMING DETERMINATION USING GENETIC ALGORITHMS
• STATISTICAL PROPERTIES OF VEHICLE TIME HEADWAYS
• STUDY OF HEADWAY AND LOST TIME AT SINGLE-POINT URBAN INTERCHANGES
• SYNTHESIS OF RECENT WORK ON THE NATURE OF SPEED-FLOW AND FLOW-OCCUPANCY (OR DENSITY) RELATIONSHIPS ON FREEWAYS
• VARIANCE REDUCTION APPLIED TO URBAN NETWORK TRAFFIC SIMULATION (WITH DISCUSSION AND CLOSURE)