If you're a cyclist and you live anywhere there are on-road bike paths, you've been there, too. Let me recount: you're pedaling merrily along in the middle of a bike lane: maybe 30 to 40 inches of space next to the curb, marked by a thick white line between you and traffic moving 20 to 30 MPH faster than you are. Maybe there are arrows and icons of cyclists on the pavement, maybe there's a sign along the roadside that says something to the effect of "No motorized vehicles in bicycle lane."