Just the facts:
Cycling just makes sense, given the low overhead, the aerobic perks, and the fact that nearly half of all trips, cycling and otherwise, are made within two miles of home.
Fortunately, bicycle commuting increased by 40 percent from 2000 to 2010. Investing in bike-friendly infrastructure, like separating cycling lanes from vehicular traffic with parked cars or posts, should maintain the trend.
Environmental impact aside, money talks. Portland recently spent close to $60 million on cycling infrastructure, the average cost of one mile of urban highway. According to this City of Portland Bureau of Transportation report: "The return on investment has been highest for bicycle transportation."