signal timing to relieve congestion for commuters through more than 30 cities in LA County ... )Halogen lamps117 V lamps (max. 100 W)(2) SITRAFFIC C940ESSystem vlotage230 V AC (-20% / +15%)Supply ... wireless traffic control to cut congestionNov 20, 2009 11:34 AM, By Wendy Leavitt, director of editorial