VOLUME EFFECTS ON SPEEDS OF 2-LANE HIGHWAYS IN ONTARIO
The effects of traffic volume on speeds of 2-lane rural highways are analyzed using a large data bank compiled in Ontario, Canada in 1980. These effects are examined for the entire practical range of volumes using two types of linear models. The first considers volumes of cars, trucks, recreational vehicles and other vehicles in the direction being analyzed, and the total volume in the opposite direction. The second model considers only aggregated passenger car units in the main direction and opposing direction. The 10th, 50th and 90th percentile speeds are estimated using each of the above models, so that the ultimate decision maker can cater to any chosen subpopulation or estimate the fraction of drivers that drive at any given speed. Regression equations are presented for Ontario locations which were analyzed, along with some sample graphs. It is observed that speeds are generally quite insensitive to volumes for a large practical range of volumes, and that the percentile speed curves tend to converge as main directional volumes increase. The 90th percentile speed equation is found to be most sensitive to main directional volume and the 10th percentile equation is least sensitive. The relative sensitivities of the different percentile speeds to opposing volumes are far less pronounced. Speeds are generally less sensitive to opposing volume than to with-flow volume. (Author/TRRL)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09658564
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Corporate Authors:
Pergamon Press, Incorporated
Headington Hill Hall
Oxford OX30BW, -
Authors:
- van Aerde, M
- Yagar, S
- Publication Date: 1983-7
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 301-313
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Serial:
- Transportation Research Part A: Policy and Practice
- Volume: 17A
- Issue Number: 4
- Publisher: Elsevier
- ISSN: 0965-8564
- Serial URL: http://www.sciencedirect.com/science/journal/09658564
Subject/Index Terms
- TRT Terms: Automobiles; Data analysis; Directional distribution; Mathematical analysis; Mathematical models; Recreational vehicles; Regression analysis; Rural areas; Rural highways; Sensitivity; Speed; Traffic flow; Traffic lanes; Traffic speed; Traffic volume; Trucks; Two lane highways; Types of traffic; Vehicle mix
- Uncontrolled Terms: Traffic direction; Two
- Geographic Terms: Canada
- Old TRIS Terms: Direction
- ITRD Terms: 8018: Canada; 626: Direction (traffic); 6473: Mathematical model; 328: Rural area; 5408: Speed; 641: Traffic composition; 671: Traffic flow; 2827: Traffic lane; 9082: Two
- Subject Areas: Data and Information Technology; Highways; Motor Carriers; Operations and Traffic Management; I71: Traffic Theory;
Filing Info
- Accession Number: 00381072
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Report/Paper Numbers: HS-036 331
- Files: HSL, ITRD, TRIS
- Created Date: Mar 30 1984 12:00AM