You cannot roller skate on the highway.

The Law

In the mid-20th century, roller skating was such a popular craze that reckless youths apparently began taking their skates to main roads and highways. Pine Bluff officials felt compelled to draft an ordinance specifically outlawing roller skating on public highways to prevent tragic collisions with automobiles. If you want to skate, you are legally required to stick to the rinks and sidewalks.