00221000

Component

https://onlinepubs.trb.or...bproceedings/13/13-015.pdf

THE DEVELOPMENT OF THE USE OF SODIUM VAPOR AS AN ILLUMINANT AND ITS APPLICATION TO STREET AND HIGHWAY LIGHTING IS DISCUSSED. THE USE OF THIS NEW SOURCE OF LIGHT WILL MEAN MANY CHANGES IN PRESENT PRACTICES AND THE RESEARCH ENGINEERS ARE WORKING ON THE PROBLEM OF ITS MOST EFFICIENT USE. THE SODIUM LAMP DERIVES LIGHT FROM THE PASSAGE OF AN ELECTRIC CURRENT THROUGH A VAPOR OF SODIUM WITH A SMALL QUANTITY OF NEON GAS. WHEN THE CURRENT IS TURNED ON THE LAMP FIRST GLOWS RED AS THE NEON GAS CARRIES THE ARC AND THEN TURNS GRADUALLY TO A GOLDEN YELLOW AS THE SODIUM VAPORIZES. THE PROCESS IS FULLY DESCRIBED. THE APPLICATION OF THE LAMP TO HIGHWAY LIGHTING IS CONSIDERED. THE RELATION OF VARIOUS KINDS OF ROAD SURFACES TO LIGHTING PROBLEMS IS BROUGHT OUT, AND THE POSSIBLE FUTURE ECONOMIES THAT MAY BE REALIZED ARE DISCUSSED. /AUTHOR/

Vol 13, ParT I, PP 244-262, 12 FIG. 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.

01490412

1934

Highway Research Board Proceedings

Digital/other

Applications; Economics; Luminaires; Sodium; Sodium vapor lamps; Street lighting; Surface course (Pavements); Vapors

Neon

Economics; Highways; Research; Safety and Human Factors

TRIS, TRB

Aug 23 1971 12:00AM

• ALCOHOL AND MOTOR VEHICLE DRIVERS
• AN EXPERIMENTAL ROAD OF CEMENT BOUND MACADAM
• ANALYSIS OF ROAD COST ON THE STATE HIGHWAYS OF WORCESTER COUNTY, MASSACHUSETTS
• APPLICATION OF EQUATION FOR ANNUAL ROAD COSTS
• COEFFICIENT OF FRICTION BETWEEN TIRES AND ROAD SURFACES
• CRACK CONTROL IN CONCRETE BASES FOR SHEET ASPHALT PAVEMENT
• DETERMINATION OF TIME SAVED BY VEHICLES USING THE NEW JERSEY HIGH LEVEL VIADUCT
• FURTHER TRACTIVE RESISTANCE TESTS WITH A GAS ELECTRIC DRIVE AUTOMOBILE
• GRAVEL TYPE STABILIZED SURFACES FOR SECONDARY ROADS
• INTANGIBLE ECONOMICS OF HIGHWAY TRANSPORTATION
• LIQUID BITUMINOUS MATERIALS FOR PLANT MIXED SURFACES
• MAKING AND USING THE TRAFFIC CENSUS
• MOTOR VEHICLE ACCIDENTS AS REFLECTED BY PSYCHOLOGICAL TESTS AND REACTION METER
• NOTES ON TRAFFIC SPEEDS
• PROGRESS REPORT ON THE REACTION OF CALCIUM CHLORIDE ON PORTLAND CEMENT
• REPORT OF COMMITTEE ON MAINTENANCE - TREATMENT OF ICY PAVEMENTS
• REPORT OF JOINT COMMITTEE ON ROADSIDE DEVELOPMENT
• REPORT OF PROJECT COMMITTEE ON FILLERS AND CUSHION COURSES FOR BRICK AND BLOCK PAVEMENTS
• REPORT OF SUBCOMMITTEE ON MAINTENANCE OF CONCRETE PAVEMENT CRACKS AND EXPANSION JOINTS
• RULES OF THE ROAD IN THEORY AND PRACTICE
• SKIDDING CHARACTERISTICS OF ROAD SURFACES
• THE ECONOMY OF HIGHWAY IMPROVEMENTS
• THE EFFECT OF CONTROL METHODS ON TRAFFIC FLOW-TRAFFIC MOVEMENTS AT SEVENTEENTH STREET AND CONSTITUTION AVENUE IN WASHINGTON, D.C.
• THE ENGINEERING VALUATION OF HIGHWAY SYSTEMS - A PROBLEM IN PUBLIC UTILITIES VALUATION
• THE PHOTOGRAPHIC METHOD OF STUDYING TRAFFIC BEHAVIOR
• THE TAXATION OF MOTOR VEHICLES IN 1932
• WEATHERING TESTS ON CONCRETE