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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
Aluminium car-body		very promising
Fibre reinforced polymers		promising
Sandwich structures		promising
Light coach interior equipment		promising
Single-axle bogies		very promising
Articulated trains (Jakob-type bogies)		promising
Mechatronic innovations for future running gear		very promising
Streamlining of head and tail		not promising
Streamlining of train sides and underfloor areas		interesting
Bogie fairings		very promising
Aerodynamic ordering of freight cars		promising
Double-decked stock		very promising

© UIC - International Union of Railways 2003