00621448

Component

http://onlinepubs.trb.org...trr/1991/1316/1316-005.pdf

https://scholar.google.co...arma&publication_year=1991

In 1976 a photometric evaluation of reflective sheetings was begun. Included in the study were 9 white and 10 yellow reflective sheetings. For each color, five 15-in. square aluminum-backed panels were prepared and placed on vertical racks on the sign shop roof in Wisconsin Rapids, Wisconsin. The panels were first put in place near the end of January 1977. From 1977 to 1982, semiannual photometric evaluations of the sheetings were performed with a photometer. From 1983 to 1987, annual reflectivity measurements were obtained with a retroreflectometer. The amount of cold cracking also was measured. All photometer and retroreflectometer tests were taken at a divergence angle of 0.2 deg and at incidence angles of -4 and +30 deg. In addition to the five panels for each color sheeting, each white sheeting had five panels prepared for the purpose of studying the effect of stone bruising on cold cracking. Artificial stone bruises were made on each of these panels (four bruises per panel, one bruise per quadrant) by means of a dull center punch. (The artificial bruise damaged the sheeting but not the aluminum.)

This paper appears in Transportation Research Record No. 1316, Visibility for Roadways, Airways, and Seaways 1991: Proceedings of a Conference, July 25-26, 1990, Washington, D.C. 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

01407151

p. 24-30

1991

Transportation Research Record

Visibility for Roadways, Airways, and Seaways, Symposium, 1990, Washington, DC, USA

0309051649

Tables (3)

Cold weather; Cracking; Loss and damage; Photometry; Reflectivity; Reflectorized materials; Sheathing; Testing; Whites; Yellow

Cold cracking

Geotechnology; Highways; Materials; Operations and Traffic Management; I35: Miscellaneous Materials; I73: Traffic Control

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

• DESIGN AND OPERATION OF A GLARE EVALUATION METER
• LOW-VISIBILITY LIGHTING CRITERIA FOR AIRPORTS AND ROADWAYS
• LUMINANCE MEASUREMENTS OF RETROREFLECTIVE WARNING SIGNS AT NIGHT USING THE CAPCALC SYSTEM
• NEW JERSEY GUIDE-SIGN SURVEY
• RESEARCH ON THE END OF LIFE FOR RETROREFLECTIVE MATERIALS: A PROGRESS REPORT
• RETROREFLECTIVITY REQUIREMENTS FOR PAVEMENT MARKINGS
• SEVEN YEARS OF ILLUMINATION AT RAILROAD-HIGHWAY CROSSINGS
• TRAFFIC SIGNAL VISIBILITY: A PRELIMINARY STANDARD FOR ROUND SIGNAL INDICATIONS DERIVED FROM SCIENTIFIC RESEARCH
• TUNNEL LIGHTING: COMPARISON AND TESTS OF SYMMETRICAL, COUNTER-BEAM, AND PRO-BEAM SYSTEMS