DEVELOPMENT OF SPEED-FLOW RELATIONSHIPS FOR INDONESIAN RURAL ROADS USING EMPIRICAL DATA AND SIMULATION
Highway capacity manuals from developed countries cannot be applied successfully in Indonesia because of large differences in driver behavior, traffic composition, and level of roadside activities. The Indonesian Highway Capacity Manual project was started in 1990 and has resulted in interim manuals for urban traffic facilities, interurban roads, and superhighways. Speed-flow relationships for interurban rural roads have been obtained from a combination of direct speed-flow measurements and simulation, using the VTI microscopic simulation model for two-lane, two-way undivided roads. The empirical data were used mainly for calibrating and validating the simulation model and for analyzing the effect on speed and capacity of cross-section and environmental conditions. The simulation model was used for determining speed-based light-vehicle units (used instead of passenger-car units) and speed-flow relationships for flat, rolling, and hilly terrain. The results can be summarized as follows: (a) the light-vehicle free-flow speed for a flat two-lane, two-way road at ideal conditions is considerably lower in Indonesia than in developed countries; (b) free-flow speed is reduced by road width and side friction such as public transit stops, pedestrians, nonmotorized vehicles, and entries and exits from roadside properties and minor roads; (c) Indonesian drivers tend to overtake at short sight distances, which reduces the slope in the speed-flow curve; and (d) the capacity for two-lane, two-way roads is slightly higher in Indonesia than in developed countries.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309061237
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1484, Traffic Operations: Highway Capacity. 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:
- Bang, Karl L
- Carlsson, Arne
- Palgunadi
- Publication Date: 1995
Language
- English
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 24-32
- Monograph Title: Traffic operations: highway capacity
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Serial:
- Transportation Research Record
- Issue Number: 1484
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Flow speed relationships; Highway capacity; Measurement; Passing; Rural highways; Sight distance; Simulation; Terrain; Two lane highways
- Uncontrolled Terms: Speed-flow relationships
- Geographic Terms: Indonesia
- Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;
Filing Info
- Accession Number: 00713571
- Record Type: Publication
- ISBN: 0309061237
- Files: TRIS, TRB, ATRI
- Created Date: Nov 21 1995 12:00AM