Several development models of the Cadillac CTS — which GM said in March will be equipped with vehicle-to-vehicle communication technology starting this year — were successfully alerted to soon-to-change traffic signals at two intersections just outside GM’s Warren Technical Center.

“This alert helps avoid the dangerous decision to either brake abruptly or accelerate through a busy intersection,” said General Motors spokesman Chris Bonelli. “It is designed to allow the driver more time to safely react to the road conditions ahead.”