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 Technology     
 evaluated     
 Overall Potential     
         
Batteries (storage technology) interesting  
Double-layer capacitors (storage technology) very promising  
Superconducting Magnetic Energy Storage (storage technology) not promising  
PEM fuel cell interesting  
Natural gas interesting  
Hydrogen engine interesting  
Gas turbine interesting  
Magnetic levitation technology (maglev) promising  
Swissmetro interesting  
Coach insulation promising  
Modification of target temperature in passenger coaches very promising  
Smart windows interesting  
 
© UIC - International Union of Railways 2003