TUNNEL LIGHTING IN EUROPE
A SET OF PRINCIPLES EMBODIED IN 1971 RECOMMENDATIONS OF THE CIE (COMMISSION INTERNATIONALE DE L'ECLAIRAGE - INTERNATIONAL COMMISSION ON LIGHTING) IS BEGINNING TO BE GENERALLY ACCEPTED THROUGHOUT EUROPE, SO THAT IT IS NOW POSSIBLE TO SPEAK OF A EUROPEAN SYSTEM OF TUNNEL LIGHTING." THE RECOMMENDATIONS COME DOWN TO THREE MAIN POINTS: THE DRIVER SHOULD BE ABLE TO LOOK INTO THE TUNNEL DURING HIS APPROACH TO IT; VISUAL ADAPTATION TO THE LOWER LEVELS OF LIGHTING MUST BE POSSIBLE, WHEN THE DRIVER IS EITHER CLOSE TO OR IN THE TUNNEL; AND THE TUNNEL INTERIOR SHOULD BE LIGHTED TO A HIGH STANDARD. ONE QUESTION, HOWEVER, HAS NOT BEEN CLARIFIED IN THE RECOMMENDATIONS: WHAT EXACTLY SHOULD BE TAKEN AS THE RELEVANT VALUE OF LUMINANCE IN THE OPEN? A FORMULA IS PRESENTED TO DEAL WITH THIS QUESTION. THE PRACTICE OF TUNNEL LIGHTING IN EUROPE IS DISCUSSED BRIEFLY IN RELATION TO THREE TYPES OF TUNNELS: LONG MOUNTAIN TUNNELS, INTERMEDIATE-LENGTH TUNNELS WITH HEAVY TRAFFIC, AND LONG URBAN UNDERPASSES.
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Supplemental Notes:
- 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.
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Authors:
- SCHREUDER, D A
- Publication Date: 1972-8
Media Info
- Media Type: Digital/other
- Features: Figures; References;
- Pagination: pp 28-32
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Serial:
- Highway Research Circular
- Issue Number: 137
- Publisher: Highway Research Board (HRB)
Subject/Index Terms
- TRT Terms: Building entrances; Foreign; Lighting systems; Luminous intensity; Screens; Tunnels
- Old TRIS Terms: Entrances (Other than doors); Tunnel lighting
- Subject Areas: Bridges and other structures; Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00221788
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Feb 3 1973 12:00AM