The first answer seems to be safety. In the Netherlands and Denmark, not only is the infrastructure good, the sheer number of cyclists means that there is relative safety in numbers. And in accidents the law favours cyclists in almost all circumstances, which probably keeps motorists on their toes. But safety isn’t everything. Milton Keynes and Stevenage, two British new towns, both have extremely good, segregated cycle paths—known as greenways—which separate cyclists and pedestrians from the roads. And in both towns, few people cycle: they prefer to drive on the fast segregated highways. To get people to cycle, you need to make them feel safe, but you also need to make other forms of transport slower and less comfortable.