In some states, riding a horse while drunk can result in a violation of impaired driving laws, as horses can be considered vehicles under certain circumstances. However, the definition of a vehicle typically depends on whether it is powered by a motor or a horse. While some courts have upheld convictions for driving horse-drawn vehicles while intoxicated, others have found that riding a horse itself does not constitute driving a vehicle.

As technology has evolved, the types of vehicles have expanded to include e-scooters, e-bikes, golf carts, ATVs, snowmobiles, and even electric wheelchairs and scooters. Impaired driving laws apply to these alternative vehicles, as seen in cases where individuals have been charged with operating riding lawn mowers, tractors, and even bicycles while drunk. Boating under the influence is also illegal in all fifty states and under federal law, with the definition of a boat varying by jurisdiction.

Understanding what qualifies as a vehicle in impaired driving cases is crucial for legal practitioners, as different states and localities may have varying definitions. It is important to be aware of the laws surrounding operating different types of vehicles while under the influence, as seen in cases involving a variety of vehicles from horse-drawn carriages to electric wheelchairs.