Lowering speed limits does nothing.
If you want to reduce the speeds that people drive at, you have to make the streets narrower and more difficult, then people automatically slow down. There's an interesting book called 'Traffic' that discusses many of these ideas.
One simple solution is to park vehicles on the street - that narrows it down, and makes people drive slower. Cities should seriously consider this as a short term solution - take city owned vehicles, and park them on the streets where they want to slow traffic.
If you want to reduce the speeds that people drive at, you have to make the streets narrower and more difficult, then people automatically slow down. There's an interesting book called 'Traffic' that discusses many of these ideas.
One simple solution is to park vehicles on the street - that narrows it down, and makes people drive slower. Cities should seriously consider this as a short term solution - take city owned vehicles, and park them on the streets where they want to slow traffic.