>>532324070
Yes, some states in the US outright ban open racing on horseback and the cart is a work around. Coincidentally it's also the most dangerous form of horse racing where both the horse and the rider can get killed. They also have trot racing which skirts around the horse back racing ban by slowing down the horses.

https://www.youtube.com/watch?v=sfSyUk4q1iE
https://www.youtube.com/watch?v=aFI7voZuG8M