Virtuous Cycles

Wired has an interesting article examining evidence that as bicycle ridership increases, per-rider accidents with cars decreases, causing a virtuous cycle. As riding increases, safety increase, so more people ride.

Also, I have a bit of catching up to do for costs:
My previous total was $171.06.

Since then, I've spent:
$20 to the CTA for an occasional L train ride.
$45 to Working Bicycle Co-Op for a guest helmet and U-Lock (they gave me a free blinky red light, too)
$30 to a woman named Julia for a yellow Schwinn Continental Tourist (for guests)
$39.27 to BicycleTires.com for fresh tires and tubes for the Schwinn.

This brings my total commuting and bicycling costs up to $305.33 since April 28, 2008.