00315074

Component

http://onlinepubs.trb.org...s/trr/1979/737/737-014.pdf

https://scholar.google.co...ngie&publication_year=1979

Several test groups of 400-W high-pressure sodium vapor lights were subjected to a 10 hour on, 2-hour off continuous cycle for two years to test the relatibility of manuacturers-supplied lamps mortality data. In general, the average life expectancy of these lamps was for below the 24000 hours advertised for them. While the test data is applicable only for lamps manufactured in later 1971 and early 1972, it is the author's opinion that it justifies considerable skepticism toward manufacturer-supplied data and that users should develop and implement contractual mechanism for enforcing performance specifications in regard to the advertised life of the lamp.

Publication of this paper sponsored by Committee on Visibility. 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

00387801

HS-029 511

pp 91-93

1979

Transportation Research Record

0309029929

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Figures (2) ; References (3)

Manufacturing; Pressure; Reliability; Service life; Sodium vapor lamps

Data; High pressure

Design; Highways; Operations and Traffic Management; Safety and Human Factors

TRIS, TRB

Oct 8 1980 12:00AM

• ACCIDENT AND OPERATIONAL GUIDELINES FOR CONTINUOUS TWO-WAY LEFT-TURN MEDIAN LANES (DISCUSSION AND CLOSURE)
• BENEFIT-COST ANALYSIS OF ADVANCE TREATMENT FOR NO-PASSING ZONES (ABRIDGEMENT)
• DISCOMFORT GLARE: A REVIEW OF SOME RESEARCH (ABRIDGEMENT)
• DRIVER PERFORMANCE WITH RIGHT-SIDE CONVEX MIRRORS (DISCUSSION AND CLOSURE)
• ECONOMIC MODELS FOR HIGHWAY AND STREET ILLUMINATION DESIGNS
• FEASIBILITY STUDY OF ROUTE GUIDANCE SYSTEM
• FORMATION AND DISSIPATION OF TRAFFIC QUEUES: SOME MACROSCOPIC CONSIDERATIONS (ABRIDGEMENT)
• GUIDELINES FOR TRAFFIC CONTROL AT ISOLATED INTERSECTIONS ON HIGH-SPEED RURAL HIGHWAYS
• HIGHWAY GUIDE SIGNS: A FRAMEWORK FOR DESIGN AND EVALUATION
• HUMAN FACTORS CONSIDERATIONS FOR IN-VEHICLE ROUTE GUIDANCE
• MAINTENANCE COSTS OF TRAFFIC SIGNALS
• MODERN ROTARIES: A TRANSPORTATION SYSTEMS MANAGEMENT ALTERNATIVE (DISCUSSION AND CLOSURE)
• OUTLINE OF THE COMPREHENSIVE AUTOMOBILE TRAFFIC CONTROL PILOT TEST SYSTEM
• PAVEMENT INSET LIGHTS FOR USE DURING FOG (ABRIDGEMENT)
• REFLECTORIZATION OF RAILROAD ROLLING STOCK (DISCUSSION AND CLOSURE)
• SHOULDER IMPROVEMENTS ON TWO-LANE ROADS (ABRIDGEMENT)
• USE OF EC-DC DETECTOR FOR SIGNALIZATION OF HIGH-SPEED INTERSECTIONS
• WARRANTS FOR LEFT-TURN SIGNAL PHASING