You cannot roller skate on the city sidewalks.

The Law Explained

In an effort to protect pedestrians from out-of-control youths on eight wheels, Biddeford banned the act of roller skating on public walking paths. The ordinance was passed during the roller-skating craze of the mid-20th century, when sidewalks were heavily congested with downtown shoppers. Today, the rule technically still stands, forcing skaters to find smoother and more legal pastures.