The corner of 15th and K streets in Washington, D.C., is busy. Buses, trucks, cars and taxis zip by. There are pedestrians and, increasingly, bikes.
Some 57 million adults ride bicycles in the U.S., whether for commuting or exercise or fun. Cities are adding bike lanes with the help of a federal program that gets its money from the highway bill. Some Senate Republicans tried — and ultimately failed — to block funding for that program, which also pays for sidewalks and other pedestrian improvements.