Cyclists will have to detour around your car, and this will pose a danger or at least a nuisance to pedestrians. In a traffic jam, it is illegal to enter an intersection unless you can get across it. This law seems to be widely unknown. The resulting confusion is very dangerous to pedestrians and cyclists. I know, they seem to be a nuisance.
Speed has a tremendous impact on safety.
This impact is often underestimated. Speed limits determine a democratically agreed level of acceptable risk. Again, look at the big picture. The faster cars go, the more space they need. Faster cars pose a higher safety problem, therefore we need more traffic lights.