There was a 64 percent increase in people biking to work between 2000-2012. With more cyclists on the roads, cities are struggling to keep up with infrastructure.
The number of cyclists tripled in the past decade.
President's Day: A celebration of two wheels?
President's day was once recognized as a day when people sold bikes.
Bike-sharing programs in New York City and around Washington, D.C. work on expanding their demographic reach.