Speed limits are too darn high

Police investigate the scene of a collision between an electric scooter rider and vehicle in Queens, New York, in March. New York last month made it possible to lower speed limits in the city — an effort to prevent crashes like these from becoming fatal amid a rise in deaths on America’s roads. | Shawn Inglima/NY Daily News via Getty Images

Drivers don’t need to go faster than 20 mph on most city streets.

Last month, a group of families whose loved ones were killed by drivers successfully...