Green Traffic Light Chime expanding with 2022.20 new software update.
Release Notes:
Green Traffic Light Chime
for Model 3, Model Y, Model S and Model X

A chime will play when the traffic light you are waiting for turns green. If you are waiting behind another vehicle, the chime will play once the vehicle advances unless Traffic-Aware Cruise Control or Autosteer is active.
Note: This chime is only designed as a notification. It is the driver’s responsibility to observe their environment and make decisions accordingly.
Editor’s note: This feature no longer appears to require EAP or FSD.