Most start stop systems will disable themselves when the heater of the car is turned ON and the car engine not hot enough yet.
As a cyclist (or motorbike owner), it is pretty usual in city to have >50% cars with engines ON at traffic light in cities when temperature are low.
Also at some point they will start their engines again. Guess who will inhale that?
Sources: https://usa.streetsblog.org/2019/10/08/report-drivers-arent-... which references the BBC
Most start stop systems will disable themselves when the heater of the car is turned ON and the car engine not hot enough yet.
As a cyclist (or motorbike owner), it is pretty usual in city to have >50% cars with engines ON at traffic light in cities when temperature are low.