The Metro is classified under North America the National Highway Traffic Safety Administration (NHTSA) as a Low Speed Vehicles (LSV). The National Highway Traffic Safety Administration (NHTSA) under rule 571.500 Standard No. 500 defines a Low-speed vehicle: 'Low-speed vehicle means a 4-wheeled motor vehicle, other than a truck, whose speed attainable in 1.6 km (1 mile) is more than 32 kilometers per hour (20 miles per hour) and not more than 40 kilometers per hour (25 miles per hour) on a paved level surface.' The NHTSA has ruled that LSV'S can operate on certain roadways, if they meet the 571.500 safety standards and:

A low-speed vehicle may be operated only on streets where the posted speed limit is 35 miles per hour or less. This does not prohibit a low-speed vehicle from crossing a road or street at an intersection where the road or street has a posted speed limit of more than 35 miles per hour.

A low-speed vehicle must be registered and insured and must display a license plate.

Any person operating a low-speed vehicle must have in his or her possession a valid driver's license.

Metro exceeds the NHTSA safety standards, but there are operational guidelines that apply to the use of the Metro in North America. The States are responsible for the enforcement of Motor Vehicle Laws and the LSV regulations as it applies to the use of the Metro on public highways varies by State.