bicycle contrails [bikes]

in theory:

Contrail is a tool for developing bicycle communities. As you ride, contrail leaves a faint chalk line behind your bike. The goal is to encourage a new cycle of biking participation by allowing the biking community to leave a unique mark on the road and to reclaim this crucial shared space.

The old cycle: More cars on the road --> more percieved danger for bikers --> fewer bikers on road --> even more cars on the road.

The new cycle: A few bicyclists ride with contrail a couple times per week --> faint lines on the road inspire curiosity and remind bikers where it's safe to ride --> new bikers are encouraged to ride and use contrail --> contrail lines get brighter as community grows.

via the super awesome poverty jetset.