Over 14,500 commuters participated in Friday's Bike to Work Day, the largest number since the first regional Bike to Work Day was held in the Washington metropolitan region in 2000. Attendance at the free event, coordinated by Commuter Connections and the Washington Area Bicyclist Association (WABA) grew by 15 percent this year and included cyclists from the District of Columbia, Maryland, and Virginia promoting bicycling as a green commute option.