San Francisco has 72 miles of bike lanes, including this one on Market Street. Tony Avelar/Special to the Christian Science Monitor
Rebecca Albrecht (r.) and Turil Cronburg arrive at City Hall Plaza with flowers on their bicycles to celebrate the end of Bike Week in Boston on May 17, 2013. Albrecht is retired and says she has been cycling about 10 miles almost every day for 40 years. Cronburg lives in Maine and cycles 15 miles a day. Melanie Stetson Freeman/Staff
Barbara Bitondo commutes by bike to work at the World Bank in Washington, D.C. She says her spiked heels ‘garner a lot of attention.’ Michael Bonfigli/Special to the Christian Science Monitor
Cyclists look out from the Marquam Bridge in Portland, Ore., during an annual ‘bridge pedal’ event that takes riders over 10 spans in the city. Rick Bowmer/AP/File
Women attend a free workshop on bicycle safety in Cambridge, Mass. Melanie Stetson Freeman/Staff
Commuters pass by a ‘bicycle barometer’ on Market Street in San Francisco. A sensor embedded in the bike lane counts the number of riders. Tony Avelar/Special to The Christian Science Monitor
New York Mayor Michael Bloomberg mounted a bicycle during a kickoff event for a new public bike rental program in New York in May. Carlo Allegri/Reuters
A woman wears leopard pumps as she bikes in Boston. Melanie Stetson Freeman/Staff
A cyclist courses down a street in Washington, D.C. Michael Bonfigli/Special to the Christian Science Monitor
Stan Ades and his wife, CC Sofronas, ride with their children to elementary school in San Francisco. Tony Avelar/Special to the Christian Science Monitor
A woman prepared to depart on a bicycle following a launch event for a new public bike rental program in New York on May 27, 2013. Carlo Allegri/Reuters
Americans are using bicycles for transportation and recreation in record numbers as the fitness and green movements, as well as high energy costs, spur a two-wheel revolution.
ByRon Scherer, Staff writer
Wearing a black Jil Sander skirt matched with an elegant Velvet T-shirt, Lucy Wallace Eustice is pedaling her bike to work on a day as clear as Baccarat crystal. Her four-mile journey takes her along a bicycle path, one of the nation's busiest, that parallels the Hudson River on one side and the Manhattan skyline on the other side.