You searched for: “alternative fuel vehicles”
alternative-fuel vehicle (AFV) (s) (noun phrase), alternative-fuel vehicles (AFVs) (pl)
A motor conveyance designed to operate on an alternative source of energy: An AFV could run on compressed natural gas, methane blend, or electricity:

The vehicle could be either a dedicated vehicle designed to operate exclusively on alternative fuel or a nondedicated vehicle designed to operate on alternative fuel and/or a traditional fuel.

This entry is located in the following unit: Energy Sources and Related Information + (page 1)