Cadillac Builds on V2V Deployment with Real-time Data From Traffic Controllers


Cadillac’s CTS sedan, one of the first production vehicles to have vehicle-to-vehicle (V2V) communication, has now successfully demonstrated vehicle-to-infrastructure (V2I) capability in Michigan.

During demonstrations, Cadillac CTS development vehicles received real-time data from traffic controllers in signal phasing and timing in collaboration with the Michigan Department of Transportation, Macomb County Department of Roads, and General Motors Co.’s research and development team.

V2I connects the Cadillac development vehicles to its surrounding infrastructure, allowing the vehicle to alert a driver to safety, mobility, and environment-related concerns ahead. The traffic signals, located adjacent to GM’s Warren Technical Center campus at the intersection of 12 and 13 Mile Roads in Warren, utilized a Dedicated Short-Range Communications (DSRC) protocol to alert drivers of a potential red light violation at their current speed.

The notification is intended to help avoid the dangerous decision to brake abruptly or accelerate once drivers approach the intersection.

To ensure driver’s privacy, V2I vehicles do not transmit any identifying information including the VIN number, registration, or MAC address in their messages. If a connected car runs a red light, the traffic signal may indicate that someone ran a red light, but will not say who or what vehicle committed the infraction.

Additionally, firewalls and other cybersecurity measures are used to ensure the DSRC signals cannot be interfered with and are only exchanged between the vehicle and infrastructure, similar to the encryption used on Cadillac’s V2V technology.

Cadillac’s V2V technology used GPS for positioning and DSRC for communication, which can handle 1,000 messages per second from vehicles up to 1,000 feet away. V2V is a standard feature on the 2017 CTS sedan in the U.S. and Canada, in addition to other safety features.

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