A decade ago, we wrote that the bicycle is one of the world's seven everyday wonders because it's so simple, effective, affordable, and pollution-free. To that list, we might have added "enriching."
Bicycling for transportation pumps money into local economies. Bikes are wheels of fortune. (Thanks to Flickr photographer hanbyholems for the picture to the right.) If your community spends money building bikeways, you and your neighbors will cycle more. Your cycling will put extra money in the local economy. (I'll explain how in a moment.) The extra money will make the community rich enough to pay for more bikeways. More bikeways will induce more cycling, and the virtuous circle will continue.
Let's break the process into steps.
Building bikeways costs money.
Bikeways are cheap, especially compared to roads and trains, but they're not free. In the Puget Sound area, construction can easily cost more than $1 million per mile for a new trail or lane -- not counting land. Seattle's 10-year Bicycle Master Plan sketches a citywide network of cycling routes estimated to cost about $240 million. Retrofitting all of Cascadia's communities for Bicycle Respect -- integrated systems of separate, signaled bikeways as found in parts of northern Europe -- would cost billions of dollars. (Sort of like RTID/ST and Pacific Gateway.)