I have a problem with this explanation: "most rule-breaking by bicyclists is the result of poor design." I lived in NYC for 20+ years and I'm currently living in San Francisco, and I can tell you the reason for bike problems is that there really are no rules for bicyclists. As a pedestrian I've nearly been killed in NYC by a bike going the wrong way down a one-way street. Or just recently in SF in the SOMA district, I saw a woman nearly hit as a bike sped along the sidewalk around a corner and never slowed down. Bikes are not supposed to be going fast on sidewalks in city, right?

It's not about bike lanes; it's about people thinking they own the streets and sidewalks because they're on a bike.