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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
Common Rail		very promising
Regenerative braking in 16,7 Hz, 15 kV systems		very promising
On-board use of braking energy in diesel-electric stock		very promising
Double-layer capacitors (storage technology)		very promising
Modification of target temperature in passenger coaches		very promising
CO2-based demand control for coach ventilation		very promising
Control of comfort functions in parked trains		very promising
Energy efficient driving strategies		very promising
Energy efficient driving by low-tech measures		very promising
Driving advice systems in suburban operation		very promising
Driving advice systems in main line operation		very promising
Optimisation of train operation by control center		very promising

© UIC - International Union of Railways 2003