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.

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  • Corporate Authors:

    Public Works Journal Corporation

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

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Filing Info

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