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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
Wide-body stock		very promising
Wheel-mounted permanent magnet synchronous motor		promising
Virtually coupled trains		promising
Ventilation control (retrofit)		promising
Ventilation control (in new stock)		very promising
Upgrading of engines		interesting
Transversal flux motor		promising
Training programs to raise awareness of personnel		very promising
Systematic train delays		interesting
Switch-off of traction group		very promising
Swissmetro		interesting
Superconducting Magnetic Energy Storage (storage technology)		not promising

© UIC - International Union of Railways 2003