CAPACITY RESTRAINT IN ASSIGNMENT PROGRAMS
A MATHEMATICAL MODEL FOR PREDICTING VEHICULAR TRAFFIC FLOW CONTAINS A DIRECT FEEDBACK MECHANISM BY WHICH CAPACITY RESTRAINTS AND THE RESULTANT CONGESTION ARE ALLOWED TO AFFECT ROUTE GENERATION, TRIP DISTRIBUTION, AND VEHICLE ASSIGNMENT IN SUCCESSIVE PROGRAM BLOCKS. IT HAS BEEN TESTED IN THE TORONTO, CANADA AREA AND HAS GIVEN PROMISING RESULTS. THE SIMULATION MODEL IS MADE UP OF INPUT DATA FROM THREE CATEGORIES: (A) LAND USE, WHERE PEOPLE LIVE, WORK, SHOP, AND PLAY, (B) TRAFFIC FACILITIES, WHAT EXPRESSWAYS AND ROADS ARE AVAILABLE, AND (C) TRIP CHARACTERISTICS, ON WHAT BASIS PEOPLE CHOOSE THEIR DESTINATIONS, MODES OF TRAVEL, AND ROUTES FOLLOWED. THESE DATA ARE ASSEMBLED IN THE FORM OF TABLES AND FORMULAS. TRAFFIC SIMULATIONS ARE THEN CARRIED OUT BY MEANS OF FIVE TYPES OF PROGRAM BLOCKS: (1) TRIP GENERATION, (2) ROUTE GENERATION, (3) TRIP DISTRIBUTION, (4) VEHICLE ASSIGNMENT, AND (5) TRAVEL TIME CALCULATION. THE EFFECTS OF CAPACITY RESTRAINTS MAKE THEMSELVES FELT AT THREE POINTS IN THE MATHEMATICAL MODEL: (1) IN FINDING OF ROUTES, (2) IN CHOICE OF DESTINATIONS, AND (3) IN CHOICE OF ROUTE.
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Supplemental Notes:
- No 297, pp 109-127, 11 FIG, 1 TAB, 29 REF. 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.
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Authors:
- Irwin, N A
- Dodd, Norman
- Von Cube, H G
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Conference:
- 40th Annual Meeting of the Highway Research Board
- Location: Washington DC, United States
- Date: 1961-1-9 to 1961-1-13
- Publication Date: 1961
Language
- English
Media Info
- Media Type: Digital/other
- Pagination: 19p
- Monograph Title: Forecasting Highway Trips
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Serial:
- Highway Research Board Bulletin
- Issue Number: 297
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Constraints; Formulas; Land use; Mathematical models; Mode choice; Route choice; Tables (Data); Traffic assignment; Traffic congestion; Traffic flow; Travel time; Trip generation
- Uncontrolled Terms: Capacity
- Old TRIS Terms: Modal selection
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00227092
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 13 2004 6:56PM