The traffic signal applies to buses and taxis too, which are using the way drawn in the middle.
https://www.mapillary.com/app/?pKey=1321040984987328

The icon on the map does not mean that a traffic signal is planted right on this location, but merely that a vehicle travelling across this point should expect to stop when lights are red.  We use this o.a. to make statistics about how many traffic signal a bus route will come across on its whole itinerary, and more.