Back in late 2016, Audi became the first automaker in the U.S. market to enable vehicle-to-infrastructure (V2I) communications in some of its vehicles. Initially only available in Las Vegas, Audi is now adding four new cities to the lineup and deploying a new feature designed called Green Light Optimization Speed Advisory (GLOSA) to help drivers hit more green lights.
Supported vehicles communicate with local traffic signal control systems through the Audi servers over 4G LTE connections to get data about signal timing. The initial traffic light information (TLI) application provided alerts to drivers about red lights they were approaching and countdown timer for the switch to green. The alerts are provided in the instrument cluster and heads-up display if the car has one.