BOMBARDIER TRAXX Last Mile locomotive can be powered by catenary, diesel engine and battery. During the normal trip the locomotive picks up the energy from the catenary but in non-electrified line it can use its internal diesel engine with reduced speed.
Why also an internal battery?
Usually if a locomotive must be introduced in and out of depot for maintenance it must be towed by an electric locotractor in order to avoid to produce exhaust smoke inside the workshop but TRAXX L.M., with its internal battery, is totally independent running thus completely emission-free and reducing the maintenance stop due to the shunting operations. In addition, a radio remote control for shunting is available to increase its operational efficiency.