SAFETEA-LU

by Kim Krisberg Mark Martin isn't inclined to sit down and shut up -- well, unless it's on the seat of a bicycle."More people need joy in their lives and there's a real simple way to get it: ride a bicycle," Martin told me. "It's a joyous thing to ride a bike." The Baton Rouge, La., bicyclist hasn't owned a car in 20 years -- "I just love my bike," he said. In fact, he loves biking so much that he said he was driving people crazy talking about the need for better biking and pedestrian infrastructure in his community. Somebody ought to do something about it, he thought, and so he did.…