I don't know how to ride a bike but I am now learning. My children love riding their bikes but in our neighborhood the bike lanes are not continuous. The streets that we do find some bike lanes that are often blocked by cars. Where are the ticketing agents when you need one. 

Bike lane blocked by multiple vehicles

Biker ride on left to avoid cars on the bike lane.

Eventually the biker avoiding vehicles parked on the bike lane decide that he was safer riding on the sidewalk.