SPEEDS OF PASSENGER CARS ON WET AND DRY PAVEMENTS
A STUDY WAS CONDUCTED IN NEW YORK OF SPEEDS ON WET AND DRY PAVEMENTS. ALL STUDY LOCATIONS WERE ON OPEN RURAL HIGHWAYS REMOVED FROM THE INFLUENCE OF INTERSECTIONS AND WITH A MINIMUM OF INTERFERENCE FROM ROADSIDE DEVELOPMENT. PASSENGER CAR SPEEDS WERE TABULATED ACCORDING TO THE SITE WHETHER ON TANGENT OR CURVED LOCATION, FOR BOTH WET AND DRY PAVEMENT CONDITIONS. CUMULATIVE SPEED DISTRIBUTION CURVES WERE PLOTTED FOR EACH LOCATION STUDIED. THESE FIGURES SHOWED THAT THERE IS VERY LITTLE DIFFERENCE IN THE SPEED DISTRIBUTIONS OF FREE-MOVING PASSENGER CARS ON WET AND DRY PAVEMENTS. THIS WAS FOUND TO BE TRUE ON MACADAM AND BLACK TOP SURFACES AS WELL AS ON THE PORTLAND CEMENT CONCRETE SURFACES. EVEN THOUGH THE SPEED OF FREE-MOVING PASSENGER CARS IS NOT GENERALLY REDUCED ON WET PAVEMENTS, AN ANALYSIS OF SPEED AND THE COEFFICIENTS OF SIDE FRICTION ACTUALLY DEVELOPED SHOWS THAT MOST DRIVERS OF PASSENGER CARS DO NOT EXCEED THE DESIGN COEFFICIENT OF SIDE FRICTION RECOMMENDED BY AASHO.
- Record URL:
-
Supplemental Notes:
- No 139, pp 79-84, 6 FIG, 3 TAB 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.
-
Authors:
- Stohner, Walter R
- Publication Date: 1956
Media Info
- Media Type: Digital/other
- Pagination: 6p
- Monograph Title: Road roughness and slipperiness: some factors and test methods
-
Serial:
- Highway Research Board Bulletin
- Issue Number: 139
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Automobiles; Bituminous materials; Design; Evaluation; Macadam; Pavement performance; Pavements; Portland cement concrete; Rural highways; Speed; Surface treating; Traffic flow; Wetting and drying tests
- Uncontrolled Terms: Design criteria
- Old TRIS Terms: Bituminous surfacing; Highway pavement; Side friction /traffic flow/
- Subject Areas: Design; Highways; Pavements;
Filing Info
- Accession Number: 00207004
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Apr 28 1994 12:00AM