Drivers will see on the dashboard an "optimal speed" — just how fast (legally) they should go to make the light.
If there's no way around the red, drivers are alerted to the upcoming stop, and a countdown shows how long the wait will be.
Audi has equipped some newer models with this Traffic Light Information system. It's a benefit of Internet-connected traffic signals and cars "speaking" to each other over what's known as vehicle-to-infrastructure (V2I) communications. The automaker says it's designed to reduce stress, and also is a step closer to autonomous driving.
The feature is available in more than a dozen cities, but not in the Philadelphia area — yet.
A Philadelphia streets official said this will work for about 1,000 traffic lights, or a third of the signals in the city. The department has an agreement with Audi and some other manufacturers who want to offer the tech to drivers in Philly after testing is complete.