Nissan to test 'intelligent transportation' system: "'Car approaching from left' and 'School ahead. Watch your speed,' are two voice messages which drivers will receive through the system which uses information obtained from nearby vehicles and roadside optical beacons.

The information is received by an onboard antenna on the vehicle to alert drivers to potential danger from approaching vehicles or inform them of traffic congestion ahead, Nissan Motor Co. Ltd. said in a statement. "