Older motorcyclists in the state of Idaho are in for a shock. The Gem State has a unique law, a ban on any motorcycle riding if you’re over the age of 88. But not on most roads, or in most towns. The law apparently only applies to the city of Idaho Falls.

The “Law Tigers” website–which is run by lawyers specializing in motorcyclists’ issues–explains the law. “The state of Idaho prohibits anyone over the age of 88 from riding a motorcycle in Idaho Falls.”

Citizens, and lawmakers, may assume this law keeps the most dangerous riders off the streets. But the truth is that the most dangerous motorcycle riders are those under 40. Even 80-something bikers don’t crash at the same rate.

In some countries, older drivers must re-pass a health test–or even a skills test–to keep their license. But it’s rare to pick an arbitrary age, such as 88, and forbid folks from driving. Or in this case riding a motorcycle.

It’s a bit bizarre that this is a state law, dictating who can ride in a specific city. I’d expect it to be a local ordinance. It’s often listed alongside other zany local laws. For example, it’s illegal for cars to backfire in Rutland, Vermont. Or in Mount Vernon, Iowa, you can’t throw a Red Ryder tow wagon onto the highway.

Perhaps Idaho’s strange motorcycle law was originally passed as a joke to tease one older rider in Idaho Falls. But there’s no evidence that the police in Idaho Falls are still enforcing it.