I was biking in to work the other day. Friends who passed me, and those going the other way, called out cheery hellos as I went. And I thought how different this was from driving. I was able to pedal along at a steady rate, instead of the frustration of stop and go traffic. I didn’t have to be tense the whole way about the possibility of some accident making me hours late to work. And if I’d been driving, I probably would never even have known whether I was passing or being passed by the same cars every day, much less have made friends with the drivers. And I wondered why anyone would choose driving over cycling.