Compressed natural gas is a common fuel in some parts of Europe, and has some pockets of popularity in the US. I rode in a CNG taxi in Gulfport, MS, many years ago... The airport busses in Baltimore are CNG, and you see CNG fleet cars operated by some gas utilities here.

CNG is much easier to handle than LNG. LNG requires cryogenic handling equipment. Main advantage to LNG is storing much more energy per volume than CNG. But anything cryogenic is very expensive.

Rgds,
Chris W.