After testing on public roads, a new software update has been deployed for Model 3 and Model Y owners with the "Hardware 3" system that adds a new 'Traffic Light and Stop Sign Control' feature. As the name implies, this enables the car to automatically recognize and stop at traffic lights and stop signs detected by forward-facing cameras and GPS data.
once activated with Tesla's Autosteer or Traffic-Aware Cruise Control assists, the system will slow the car down to stop for traffic lights and stop signs. The driver will then need to pull Autopilot stalk or press the accelerator pedal to continue driving through the intersection when it's safe.
There are limitations, however, as the system still automatically slows the car down even if the traffic light is green. It also won't work with all types of intersections including railroad crossings, keep-out zones, toll booths, and crosswalk systems.
