"If there weren't cars, we wouldn't need stop signs," says Andy Thornley of the San Francisco Bicycle Coalition. "They're not there for bicycles." Bikers can safely slow down, look both ways, and proceed without sacrificing the momentum necessary to keep cycling, says Thornley. Lawmakers tend to favor the full-stop, in part because not all cyclists are skilled enough to judge the safety of proceeding through an intersection. During a debate in the Oregon state legislature, one representative admitted that he doesn't like stopping at signs. "But I do it because it's the law," he said. Plus, if bikes can cruise through stop signs, why not cars? Why do bikes deserve special treatment?
This piece also has an interesting distinction between "vehicularists" and "facilitators". I think I'm a vehicularist, but I can see both sides.