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Title:

DEVELOPMENT OF SPRAY-REDUCING MACADAM ROAD SURFACINGS IN THE UNITED KINGDOM, 1967-1987

Accession Number:

00467883

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309044603

Abstract:

Increases in traffic speeds and intensities, associated with the development of the motorway system in the United Kingdom since the late 1950s, have accentuated the problem of vehicle-generated spray. Although some reduction in spray dispersion can be achieved by improved mudguard design, a more effective solution is to use a permeable wearing course that acts both as a sponge and as a draining layer. Pervious macadam with 20-mm aggregate was deveoped for roads from the 10-mm nominal size "friction course" that was developed in the 1950s to minimize aquaplaning on airfield runways. The evolution of pervious macadam has been primarily the result of a number of road trials that have led to specification trials by the Department of Transport. The resulting specification for pervious macadam is included in the latest revision of British Standard 4987. The material can be expected to have effective spray-reducing properties for 3 years for a traffic flow of 7,000 commercial vehicles per day (cvd) per lane or for 6 years for 2,500 cvd. To improve the long-term durability of the material and its economic viability, a road trial was started in 1984 to study the performance of pervious macadams with polymer-modified binders.

Supplemental Notes:

Publication of this paper sponsored by Committee on Characteristics of Bituminous-Aggregate Combinations to Meet Surface Requirements. 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 #:

01492601

Authors:

COLWILL, D M
DAINES, M E

Pagination:

pp 196-202

Publication Date:

1987

Serial:

Transportation Research Record

Issue Number: 1115
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

66th Annual Meeting of the Transportation Board

Location: Washington District of Columbia, United States
Date: 1987-1-12 to 1987-1-15

ISBN:

0309044603

Media Type:

Print

Features:

Figures (1) ; References (16) ; Tables (6)

Uncontrolled Terms:

Effectiveness; Spray control

Geographic Terms:

United Kingdom

Subject Areas:

Economics; Highways; Materials; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Mar 31 1988 12:00AM

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