Milfred and Hands test drive Madison's "20 is Plenty" edict that feels cementy when you actually try to drive that slow -- not that many if any people ever will for very far. Sure, driving so slow in theory makes it easier for a car to stop. But "slow speeders" aren't the problem. Real speeders are. And that requires more traffic enforcement, not feel-good laws pretending motorists will drive slower in cars than many bicycles do on the city's bike paths.