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Technology	evaluated	Overall Potential	-- show additional criterion -- Barriers Benefits (other than environmental) Energy efficiency (single vehicles) Status of development Technology field Vehicle - fix costs
On-board energy storage in DC systems		promising
Natural gas		interesting
Multiple units (MUs) vs. loco-hauled trains		very promising
Moving block		promising
Modular train sets		promising
Modification of target temperature in passenger coaches		very promising
Medium-frequency transformer		very promising
Mechatronic innovations for future running gear		very promising
Magnetic levitation technology (maglev)		promising
Lubrication of wheels and tracks		interesting
Loss reduction by optimised power intake		interesting
Light coach interior equipment		promising

© UIC - International Union of Railways 2003