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.