FAIL SAFE: A SIGN OF THE TIMES

IF AN INTERSECTION IN A METROPOLITAN AREA WARRANTS A TRAFFIC SIGNAL, IT ALSO WARRANTS A FAIL SAFE SYSTEM TO PERMIT ITS OPERATION INDEPENDENT OF THE POWER LINE. UNDER CONDITIONS OF GOOD INTERSECTION VISIBILITY, LIGHT VOLUMES AND LOW APPROACH SPEEDS, FLASHING TYPE OPERATION FROM SIGNAL MOUNTED BATTERY INVERTER SYSTEM UNITS IS ACCEPTABLE. THE MAJORITY OF INTERSECTIONS, HOWEVER, DUE TO MODERATE OR HIGH APPROACH SPEEDS, POOR VISIBILITY, HEAVY VOLUMES OR CRITICAL PEDESTRIAN MOVEMENTS SHOULD BE EQUIPPED WITH A LP GAS GENERATOR. RECENT ADVANCES IN THE TECHNOLOGY OF SMALL PORTABLE GENERATORS HAVE MADE POSSIBLE THE CONSTRUCTION OF RELIABLE LOW MAINTENANCE MACHINES WHICH ARE CONSIDERED MOST DESIRABLE FOR THE APPLICATION.

• Authors:
  • Muller, C A
  • Miller, M E
• Publication Date: 1974-1

Media Info

• Pagination: p. 5-8
• Serial:
  • IMSA Signal Magazine
  • Volume: 10
  • Issue Number: 1
  • Publisher: International Municipal Signal Association

Subject/Index Terms

• TRT Terms: Coal gasification; Electric batteries; Intersections; Power loss; Traffic signals
• Old TRIS Terms: Gas generating systems; Power failure
• Subject Areas: Energy; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226884
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 5 1974 12:00AM