You cannot drive a vehicle with ice picks attached to the wheels.

The Law Explained

In the town of Whitehall, it is strictly forbidden to attach ice picks to the wheels of your car or tractor to gain traction in the snow. While it sounds like a scene out of a post-apocalyptic movie, early motorists actually attempted this dangerous DIY modification to handle harsh Montana winters. The ensuing damage to dirt and cobblestone roads prompted a swift ban.