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Title:

SIMPLIFIED APPROACH TO MODELING FREEWAY OPERATIONS AND CONTROL

Accession Number:

00099665

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/030902384X

Abstract:

This paper develops a simplified model for simulating freeway operations influenced by entrance-ramp metering or closure. The model's application to a real freeway corridor is demonstrated. The model is based on the assumption that that entire corridor can be adequately represented by only 2 routes interconnected by equally spaced entrance and exit ramps. Optimal control is achieved by minimizing total corridor travel time. The effectiveness of 3 control strategies (entrance-ramp metering, entrance-ramp closure, and total interchange closure) is investigated. Traffic flow on a real freeway corridor was simulated with this model. The model compared favorably with observed conditions. When the effects of the 3 control strategies were investigated, freeway flow rates resulting from optimal control conditions were found to be nearly identical for each strategy. Identifying the optimal flow rate permitted accurate calibration of the model and reliable results. The model can be useful for initial planning evaluations. Data requirements for the model are minimal, and its application is straightforward.

Supplemental Notes:

Publication of this paper sponsored by Committee on Freeway Operations. 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.

Monograph Accession #:

01411394

Authors:

Allen, Brian L
Liew, C Jen

Pagination:

pp 88-96

Publication Date:

1975

Serial:

Transportation Research Record

Issue Number: 533
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

54th Annual Meeting of the Transportation Research Board

Location: Washington District of Columbia
Date: 1975-1-13 to 1975-1-17

ISBN:

030902384X

Media Type:

Print

Features:

Figures (8) ; References (18)

Uncontrolled Terms:

Closures; Effectiveness; Models

Old TRIS Terms:

Subject Areas:

Highways; Operations and Traffic Management

Files:

TRIS, TRB

Created Date:

Nov 5 1975 12:00AM

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