Way ahead of ya!

Map: https://worldpopulationreview.com/state-rankings/kei-truck-legal-states

No recorded law: 28

Legal: 19

Illegal: 2

https://keitruckconnect.com/us-states-you-can-drive-kei-trucks/

State-Specific Legality of Kei Trucks: The permissibility of these compact, fuel-efficient vehicles varies across the U.S., largely due to differing safety and environmental standards.

Are Kei Trucks Legal in California? In the Golden State, Kei trucks can be driven on local roads, but not on freeways. This is due to the fact that many of these vehicles are not equipped with EPA-compliant engines for highway use. However, there are no restrictions on their use for off-road activities. Their off-road capabilities make them a popular choice for those in need of a compact work or recreational vehicle.

Are Kei Trucks Legal in Texas? In the Lone Star State, the situation is a bit different. Kei trucks are not street-legal due to the state’s stringent safety standards for passenger vehicles. These trucks often lack standard safety features such as airbags and seatbelts, which can make them less safe in an accident. However, there are exceptions to this rule. If the mini truck is used for agricultural purposes or has been modified to meet the state’s safety standards, it may be allowed on public roads. In these cases, the necessary permits and inspections are required. Laws Governing Kei Trucks in other States. The permissibility of Kei trucks varies greatly across the U.S. For instance, in Alabama, you can use mini trucks on any public roads except interstate highways. The speed limit for these vehicles is 25 mph.

Florida allows registered mini trucks to operate only on streets with a posted speed limit of 35 mph or less. In Louisiana, you can use mini trucks freely with a speed limit under 55 mph. North Carolina allows mini trucks to be licensed and used on all NC roads.

In Washington, mini trucks are street legal. Wyoming permits mini trucks on any roads except for interstate highways. It’s important to note that none of the 50 states allow mini trucks on interstate highways. This is due to safety reasons and the fact that most Kei trucks can only reach a maximum speed of 65 mph, which is lower than the speed limit on interstates.

My state did, otherwise I'd be driving one right now. A friend with a Subaru Sambar is being told hers should not have been allowed to be registered and is trying to fight it.

I think someone who tried to do that might just disappear in this day and age. Don't ask gen-z, we won't know.