Have you ever driven in a congested city? Someone stopping out of the blue when green is on is definitely a danger to all those around the car he/she/it is driv

Have you ever driven in a congested city? Someone stopping out of the blue when green is on is definitely a danger to all those around the car he/she/it is driving. Granted, that might not be the case somewhere in the middle of the US where there's a car passing every 5-10 minutes or so.