00641423

Component

http://onlinepubs.trb.org...trr/1993/1409/1409-008.pdf

https://scholar.google.co...stin&publication_year=1993

A primary visual guide for a motor vehicle driver is the use of pavement markings on the centerline and edge line of the roadway. The nighttime visibility performance of these markings is predicted by a surrogate method of laboratory or field photometric measurement. There are currently several photometric systems in use that vary widely in geometric and precision capabilities. With the advent of modern pavement markings with a variety of retroreflective optical systems and surface characteristics, common retroreflective measurements in the laboratory and field have generally been found to lack correlation with the markings visibility performance of drivers. The nighttime visibility of new, dry centerline pavement markings as viewed from a stationary automobile and semitruck are compared with laboratory and field photometric measurements. The visibility results are compared with the photometric methods. The common test geometries used in the industry today are found to have poor correlation with driver visual perception at most distances. A laboratory test method has been developed with the hope of better characterizing actual pavement marking retroreflective performance. This test method measures products at the same photometric geometries at which a driver actually observes pavement markings. Excellent agreement between driver visual observation and this test method was obtained at multiple distances.

This paper appears in Transportation Research Record No. 1409, Maintenance Management, Traffic Safety, and Roadsides. 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

01403253

English

p. 69-75

1993

Transportation Research Record

0309055563

Figures (2) ; References (3) ; Tables (7)

Drivers; Measuring methods; Night visibility; Perception; Photometry; Retroreflectivity; Road marking tapes; Work zone traffic control

Geotechnology; Highways; Maintenance and Preservation; Materials; Operations and Traffic Management; Safety and Human Factors; I35: Miscellaneous Materials; I60: Maintenance; I73: Traffic Control

TRIS, TRB, ATRI

Jan 24 1994 12:00AM

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