Fuel and refuelling
Because it is less expensive than gasoline, natural gas is used as a transportation fuel mainly by high-use vehicles, such as taxis, buses and fleet cars. Natural gas is sold in kilograms at retail sites and in cubic metres or gigajoules at on-site locations. Most retail stations also post the gasoline-equivalent price (litre-gasoline equivalent, or LGE).
Refuel at home or at work
Natural gas users can also take advantage of on-site refuelling units located at a place of business or right at home. The refuelling units, known as vehicle refuelling appliances (VRAs), are certified natural gas compressors. There are several VRA system configurations available for use in commercial and residential applications. Natural gas vehicles can be refuelled overnight with a time-fill system, or in two to three minutes with a fast-fill system.