One or more LFT can mounted on a truck to carry the required amount of LNG fuel. The LNG Fuel Tank is manifolded with on-board heat exchanger. The heat exchanger can receive LNG from the fuel tank and also receive the hot coolant and during the process hot coolant re-gasifies LNG. This re-gasified LNG in the form of Natural Gas, after regulation of pressure it is used as fuel in the vehicle engine.