Ideally cars should also be limited to 20 mph on all non-arterial streets, and IMO no faster than ~30 mph anywhere that isn’t a highway.<p>Drivers have a <i>dramatically</i> longer time to react and much better road awareness at 20mph compared to 30–35 mph, and at 20 mph something like 5% of collisions with cyclists&#x2F;pedestrians are fatal, whereas at 35+ mph the majority of such collisions are fatal.<p>Fast-moving cars are death machines, in the hands of people I am not happy to trust with my life.