Mine says "Alternative Fuel". Access to the HOV lanes, but you pay full registration fees. There are a limited number of plates for this classification, so there may not be any available. Poke around on the MVD web site to get details.
That is very interesting and exactly what I wanted to know, because technically the Volt is not an Alternative fuel vehicle defined by ADOT. They reserve that for pure EV, CNG, LP cars. From what their website says, the Volt should have gotten an energy efficiency plate, which is the plate capped at 10,000 and no longer available. Alternative fuel plates are still available if you drive an EV car like a Tesla/Leaf/Bolt. I've seen several Volts around Phoenix with the Alt Fuel plate on them.. Maybe there is a way to get one of those still.
Actually, I think there has been some changes in the plates and the program names. As I said my plate says "Alternative Fuel" on the bottom, but in the center of the plate between the first three numbers and the last three letters it says "Hybrid". So I think they have changed things up more recently. The web site is confusing at best.
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