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Title:

PRECISION OF LOCKED-WHEEL TESTERS FOR MEASUREMENT OF ROADWAY SURFACE FRICTION CHARACTERISTICS

Accession Number:

00982150

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Public/Blurbs/155236.aspx

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Order URL: http://worldcat.org/isbn/0309094631

Abstract:

The present state-of-the-art locked-wheel testers for roadway surface friction evaluation are fully automated. As with any testing using subject-driven instrumented devices, the major concerns of the end usefulness of the resulting data are accuracy and precision. Although a level of uncertainty is always inherent in any measurement process, it must also be appropriately quantified or assessed. Therefore, the Florida Department of Transportation (FDOT) initiated a field study to assess the level of precision of its own locked-wheel testers for field measurements. Friction measurements were acquired by using four friction locked-wheel testers concurrently on a number of asphalt section sites. These test sections were randomly selected to include both open- and dense-graded surface mixtures. The collected friction data were first analyzed to determine the friction characteristics at each test location, in terms of a friction number at 40 mph with a standard ribbed test tire (FN40R). The results were then used as a basis for an evaluation of the repeatability and reproducibility of the friction units. In addition, the effects of pavement surface texture on friction measurements were assessed. A description of the testing program, the data collection effort, and the subsequent analyses and findings is presented.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1869, Pavement Rehabilitation, Strength and Deformation Characteristics, and Surface Properties 2004.

Monograph Accession #:

00982133

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Choubane, B
Holzschuher, C R
Gokhale, S

Pagination:

p. 145-151

Publication Date:

2004

Serial:

Transportation Research Record

Issue Number: 1869
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309094631

Features:

Figures (7) ; Photos (1) ; References (3) ; Tables (3)

Subject Areas:

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

Files:

TRIS, TRB, ATRI

Created Date:

Nov 11 2004 12:00AM

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