Eric from KCMO on 6/30/2021 1:01:32 PM:
Missouri is the Show Me State. Here is the information (rules) as quoted (cut/paste) from the Katy Trail State Park webpage. I will even back up what I say with a link. Also, food for thought.....the technology for small electric scooters, skateboards, bikes, etc has exploded in recent years. The one wheel skateboard thing looks like a BLAST by the way. Perhaps the state park rules are falling somewhat behind the technology and will eventually need to be updated or clarified. They do specify 20 mph limit, but some you will "what about?" this to death.
PERMITTED USES
Katy Trail State Park has been designed specifically for walking and bicycling. The majority of the trail is accessible to persons with disabilities. All motorized equipment is prohibited except official and emergency vehicles. Electrically assisted pedal-powered bicycles and tricycles (maximum speed of 20 mph) are allowed. Also allowed are electrically powered mobility devices for persons with disabilities, such as Segways and electric golf carts. Gas-powered vehicles, including ATVs and ORVs, are not allowed. No hunting or discharging of firearms is allowed. All state park rules apply and are posted at trailheads. The trail is open only from sunrise to sunset. Horses are permitted from Clinton to the state fairgrounds in Sedalia and from Tebbetts to Portland. Equestrian parking is located at the Henry County Fairgrounds in Clinton and the Missouri State Fairgrounds in Sedalia as well as the following trailheads: Calhoun, Windsor, Green Ridge and Mokane.
https://mostateparks.com/page/57944/general-information#uses