What I've observed is that everybody in the US -- cars, bikes, pedestrians -- is driven by opportunity and convenience. Cars drive above the speed limit while t

What I've observed is that everybody in the US -- cars, bikes, pedestrians -- is driven by opportunity and convenience. Cars drive above the speed limit while texting. Bikes and cars roll through stop signs. Bikes take short-cuts that avoid obstacles and intersections. And so forth. The law is the law, but is not an immovable boundary condition. People will factor the likelihood of enforcement or injury into their habits. Enforcement (in my locale) follows patterns of crashes or complaints. Parts of town where lawless cyclists cause actual problems will find themselves on the receiving end of an enforcement "sting."