00492054

Component

http://onlinepubs.trb.org...trr/1989/1213/1213-005.pdf

https://scholar.google.co...nson&publication_year=1989

A wide variety of light sources is used for externally illuminated highway signs. Some of these light sources change the color appearance of signs at night. This study evaluates acceptable alternative light sources for illuminating highway signs. Light sources investigated included incandescent, fluorescent, metal halide, mercury, high pressure sodium, and low pressure sodium lamps. The metal halide lamp performed best overall and is recommended to illuminate a broad range of highway sign colors. This also could include the use of metal halide lamps in future automobile headlights. Mercury lamps that are economical and provide good color rendition on green, blue, and white are recommended for overhead signs. With some compromise on the color rendition, high pressure sodium is another cost-saving alternative for overhead signs. High pressure sodium is also the best choice to illuminate construction and maintenance signs.

This paper appears in Transportation Research Record No. 1213, Human Performance and Highway Visibility: Design, Safety, and Methods. 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

01414055

p. 27-34

1989

Transportation Research Record

0309048095

Figures (7) ; References (3) ; Tables (4)

Color; Cost effectiveness; Fluorescent lamps; Halides; Illuminated traffic signs; Incandescent lamps; Lamps; Mercury vapor lamps; Metals; Overhead traffic signs; Performance evaluations; Sodium vapor lamps; Work zone traffic control

Metal halide lamps

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Mar 31 1990 12:00AM

• AN ANALYTICAL MODEL FOR DRIVER RESPONSE
• CONSPICUITY OF SUPRATHRESHOLD REFLECTIVE TARGETS IN A DRIVER'S PERIPHERAL VISUAL FIELD AT NIGHT
• DATA ACQUISITION AND ANALYSIS SYSTEM BASED ON A LAP-TOP COMPUTER
• DRIVER BEHAVIOR MODEL OF MERGING
• FACTORS AFFECTING SPEED VARIANCE AND ITS INFLUENCE ON ACCIDENTS
• MEASURING ROAD USER BEHAVIOR WITH AN INSTRUMENTED CAR AND AN OUTSIDE-THE-VEHICLE VIDEO OBSERVATION TECHNIQUE
• PCDETECT: A REVISED VERSION OF THE DETECT SEEING DISTANCE MODEL
• REDESIGN AND EVALUATION OF SELECTED WORK ZONE SIGN SYMBOLS
• SIGN LUMINANCE AS A METHODOLOGY FOR MATCHING DRIVER NEEDS, ROADWAY VARIABLES, AND SIGNING MATERIALS
• SUPPLEMENTAL INTERCHANGE SIGNING AND DRIVER CONTROL BEHAVIOR