Concerns about the security of San Francisco Bay area roads and bridges have prompted officials to activate a new camera surveillance system.
The new wireless cameras are surveying seven bridges and three tunnels in the Bay Area. They use infrared light to detect trespassers in the dark, and can tilt, pan and zoom in on particular targets. The system was originally developed by Caltrans in response to the September Eleventh attacks. But security concerns stemming from the war in Iraq led the agency to activate it earlier than planned.