When I cycle inside the city, where there’s another traffic light every 300 meters or so, I play a small memory game by remembering the cars that drive next to me. Often I would see the same car multiple times when I catch up with it while it stands at a traffic light or in a traffic jam. Sometimes, though less often, a car would catch up with me.
I also noticed several times that I would get to the destination quicker, or as quick, or perhaps a few minutes later than a friend of mine with a car, and we would leave from the same point.
It seems like using a car inside a busy city doesn’t bring that much advantage in terms of speed when comparing to riding a bicycle.