SOLAR POWERED SIGNAL EASILY INSTALLED

A solar-powered school crossing signal was installed in Davis, California, in December 1988, and the city has had no problems with the unit since. The purchase price was about $4,000 and assembly and installation time came to around eight hours. The internal 365-day time clock has been programmed to operate the flashing light when children are present (school days only) during the morning, lunch, and afternoon hours. The lights have a monitor that switches them to battery power on cloudy days. Storage batteries, which are enclosed in a metal box attached to the pole, can power the lights for 30 consecutive days and have a one-year guarantee. The halogen bulbs use 17.5 volts and have 4,500-hour lifetimes.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1606878
• Corporate Authors:

  Public Works Journal Corporation

  200 South Broad Street
  Ridgewood, NJ  United States  07451
• Publication Date: 1989-12

Media Info

• Features: Photos;
• Pagination: p. 78
• Serial:
  • Public Works
  • Volume: 120
  • Issue Number: 13
  • Publisher: Hanley Wood
  • ISSN: 0033-3840
  • Serial URL: http://www.pwmag.com

Subject/Index Terms

• TRT Terms: Costs; Flashing traffic signals; School crossings; Solar energy; Storage batteries; Traffic control devices
• Old TRIS Terms: School crossing control devices
• Subject Areas: Finance; Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00490500
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 1990 12:00AM