00216663

Component

http://onlinepubs.trb.org.../hrbbulletin/43/43-003.pdf

PHYSICAL AND OPTICAL CHARACTERISTICS OF SIGN MATERIALS AND DESIGN AND APPLICATION OF A REFLECTOMETER DEVISED BY THE KENTUCKY DEPARTMENT OF HIGHWAYS ARE DISCUSSED. ACCELERATED WEATHERING PROCEDURES AND SPECIFICATION STANDARDS ARE DESCRIBED. FIELD STUDIES PARALLELING LABORATORY WORK AND A POSSIBLE CORRELATION BETWEEN THE TWO ARE DESCRIBED. THE FIELD WORK INCLUDED SEVERAL THOUSAND INDIVIDUAL OBSERVATIONS COVERING 30 DIFFERENT SIGN-SURFACE TYPES UNDER ACTUAL CONDITIONS ON A NIGHT-VISIBILITY DRIVING-COURSE. MOST OF THE MAJOR TYPES OF SURFACES AVAILABLE WERE REPRESENTED. IN ADDITION TO USING ORDINARY SEALED-BEAM HEADLAMPS, FIELD OBSERVATIONS WERE MADE USING POLARIZED HEADLAMPS AND VIEWERS. /AUTHOR/

No 43, pp 32-44, 11 FIG, 3 REF 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

01410462

pp 32-44

1951

Highway Research Board Bulletin

Print

Accelerated weathering; Field tests; Headlamps; Laboratory tests; Night visibility; Optical instruments; Optical properties; Physical properties; Reflectivity; Reflectometers; Roadside; Signs

Geotechnology; Highways; Materials; Safety and Human Factors

TRIS, TRB

Apr 28 1994 12:00AM

• A STUDY OF THE RELATIONSHIP BETWEEN PHOTOPIC AND SCOTOPIC VISUAL ACUITY
• FACTORS AFFECTING THE PERCEPTION OF RELATIVE MOTION AND DISTANCE BETWEEN VEHICLES AT NIGHT
• FILTER STUDY OF THE EFFECT OF CERTAIN TRANSMISSION FILTERS ON VISUAL ACUITY WITH AND WITHOUT GLARE