The City of Arcadia is a community of more than 56,000 people. Although part of the bustling San Gabriel Valley area of Los Angeles County, until recently Arcadia could only monitor traffic flow conditions through field observations or manage its traffic signals by directly accessing the controller cabinets.   In addition to typical congestion for a city its size, Arcadia’s traffic was compounded by nearby activity centers, including the Santa Anita Race Track, the L.A. Arboretum, the Santa An...