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Traffic Signals - battery backup
The City of Scottsdale's traffic signal section has now installed battery backup systems
(UPSs) at Scottsdale's busiest intersections. The increased safety to motorist and
police officers is tremendous! In the past, during a power outage, an officer was
required to direct traffic at dark intersections. This is hazardous to police
officers and can cause delay to motorists. With the installation of these backup
units at 25 of our busiest intersections, we will virtually eliminate power outages,
thereby dramatically increasing safety to motorists as well as officers who have to direct
traffic during power outages. As of 10/27/01, we have twenty signals with battery
back up. What made installation of battery backup possible, was the installation of
low power light emitting diodes (LEDs) which replaced incandescent lamps.
Environmentally friendly LEDs drastically reduce electric consumption. For more
information about LEDs please visit a comparison
of power used by incandescent and LEDs.
