NOVELTY - The system (10) for producing a hydrogen-enriched fuel useful as an alternative fuel, comprises a reformer (12) to react water vapor (steam) and a hydrocarbon in the presence of a catalyst at a selected temperature and pressure to form a hydrogen-rich gas, a gas blending apparatus (14) in flow communication with the reformer and with a source of a hydrocarbon fuel to blend the hydrogen-rich gas and the hydrocarbon fuel at a predefined ratio, a storage system (18), a dispensing system (20), a shift reactor, a carbon dioxide scrubber, a vehicle, and a control module.    USE - The system is useful for producing a hydrogen-enriched fuel, which is useful as an alternative fuel such as hydrogen and natural gas in motor vehicle engines.    ADVANTAGE - The system ensures economical production of hydrogen-enriched fuel with high purity, high-energy efficiency and less operating cost, and is simple and compact.    DETAILED DESCRIPTION - The system (10) for producing a hydrogen-enriched fuel useful as an alternative fuel, comprises a reformer (12) to react water vapor (steam) and a hydrocarbon in the presence of a catalyst at a selected temperature and pressure to form a hydrogen-rich gas, a gas blending apparatus (14) in flow communication with the reformer and with a source of a hydrocarbon fuel to blend the hydrogen-rich gas and the hydrocarbon fuel at a predefined ratio to produce the hydrogen-enriched alternative fuel with a selected composition having 10-25% by volume of hydrogen and selected percentages by volume of hydrocarbon, hydrocarbon fuel and impurities, a storage system (18) in flow communication with the gas blending apparatus to store the hydrogen-enriched fuel, a dispensing system (20) to dispense the hydrogen-enriched fuel to a vehicle, a shift reactor in flow communication with the reformer to react carbon monoxide in the hydrogen-rich gas stream with steam to form additional hydrogen and carbon dioxide, a carbon dioxide scrubber in flow communication with the shift reactor to remove carbon dioxide from the hydrogen-rich gas stream, a vehicle having an engine (26) to burn the hydrogen-enriched fuel, and a control module on the vehicle to gather data relating to emissions, fuel consumption and engine performance. The gas blending apparatus comprises a hydrogen-rich gas chamber to receive the hydrogen-rich gas, a hydrocarbon fuel chamber to receive the hydrocarbon fuel and a blending chamber in flow communication with the hydrogen chamber and the hydrocarbon fuel chamber to mix the hydrogen-rich gas and the hydrocarbon fuel. The system is located proximate to a refueling station for alternative fueled vehicles. The reactor and the blending apparatus are located on board the vehicle.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a system for producing a hydrogen-enriched fuel.    System (10)    Reformer (12)    Gas blending apparatus (14)    Storage system (18)    Dispensing system (20)    Engine. (26)