In December, Waze, the crowd-sourced GPS navigation application owned by Google, began testing a feature that displays traffic lights for users. Over the past few months, this feature has been gradually rolled out to more users in various countries.
A recent discussion on Reddit indicates that the rollout is occurring randomly across regions, confirming that Waze is still conducting tests before initiating a wider release. This also explains the absence of an official announcement from the company.

It's worth mentioning that the traffic lights feature is not entirely new, as several other navigation apps, including Google Maps, have offered this capability for some time. Therefore, if you haven't seen traffic lights on Waze after updating to the latest version, you may want to consider using Google Maps or another navigation app that supports traffic lights in the meantime.
Source | Via