[JMintzer]

Originally Posted by OrangeBlossomBaby

Right. It has to have the windshield, and be registered and insured as an LSV, IF it is made to go between 20 and 25mph.

Here are the actual rules, from the government website:
Low Speed Vehicles - Florida Department of Highway Safety and Motor Vehicles

Section 320.01(41), Florida Statutes, defines LSVs as “any four-wheeled vehicle whose top speed is greater than 20 miles per hour, but not greater than 25 miles per hour.” LSVs must be registered, titled and insured with personal injury protection (PIP) and property damage liability (PDL) insurance. Any person operating an LSV must have a valid driver license in their immediate possession.

LSVs may be operated only on streets where the posted speed limit is 35 MPH or less and must be equipped with the following safety equipment:

Headlamps;
Front and rear turn signals;
Stop lamps;
Tail lamps;
Reflex reflectors, red – one each side and one on the rear;
Exterior mirror on the driver side and an interior rear-view mirror or exterior mirror on passenger side;
Parking brake;
Windshield;
Seat belt for each designated seat; and a
Vehicle identification number (VIN).

So if you want to buy an Evolution ED-5, and don't want to change its stock speed to go under 20, then you have to follow all the above. If you choose to change the stock speed to top out at under 20, then it's fine. But the way it comes from the manufacturer, is set to go 25.

As for the heights - most of the tunnels will be too short at the sides, requiring the OP to drive closer to the middle of the tunnel. That's all well and good until someone comes into the tunnel from the opposite direction.

Do the Evolution ED-5 not have all of those features?

Obviously, FL is allowing them to be sold, so where's the problem?