Drivers don't expect objects traveling at 30km/h on the sidewalk, but that doesn't matter. Drivers are supposed to be on the roads. I suppose the idea is that t

Drivers don't expect objects traveling at 30km/h on the sidewalk, but that doesn't matter. Drivers are supposed to be on the roads. I suppose the idea is that the bike would just zip across the intersection at that speed? The people preferring bikes on sidewalks are thinking of non-athlete bike riders. They never go that fast. At intersections, they dismount and walk. These bike users are far more compatible with pedestrians than they are with cars.