Active Living Research
Only 1% of all daily trips in the United States are made by bicycle, including fewer than 1% of trips to school by children younger than age 16. However many more trips could be made by bicycle, as 40% of trips made in the United States are shorter than two miles.
http://www.activelivingresearch.org/dailybiketravel#.UZLQ5vhHB_g.twitter
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