Cycling infrastructure designed by people who don't cycle is far too common. A favourite example I have to deal with often is when the path has to narrow, so t

Cycling infrastructure designed by people who don't cycle is far too common. A favourite example I have to deal with often is when the path has to narrow, so they put up signs telling all cyclists to dismount. I pass through a few of these often, and whenever a cyclist obeys the sign it creates immediate congestion because pushing a bike is slow and takes up more space. Then you get a cascade effect of pedestrians stepping into car traffic to avoid the bottleneck. Another is rumble strips to slow down bikes at pedestrian crossings. It doesn't slow anyone enough to prevent incident, and tends to give pedestrians an illusion of priority so they stop looking for bikes in the path. Not to mention being uncomfortable enough to discourage using the bike path at all, and shaking lights out of position.