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Re:Seth Vidal, creator of yum, killed in hit and run accident by bagels on Tuesday July 09, 2013 @06:33PM (#6016136)
(like we already mostly have for pedestrians)

If you're talking about sidewalks, it's barely separate, as in a city there are conflicting paths between the road and the sidewalk every dozen feet (every driveway or intersection).

Re:Seth Vidal, creator of yum, killed in hit and run accident by baddox on Tuesday July 09, 2013 @06:35PM (#6016150)
Crossing a street is a lot different than traveling with the flow of traffic in a lane.