Public Transportation and Smart Growth

https://en.wikipedia.org/wiki/Siemens_ACS-64

https://en.wikipedia.org/wiki/EuroSprinter

Now, all Diesel Locomotives are Diesel Electric. i.e. the Diesel engine run a generator that produced electricity the propels the electric motors on the wheels. Thus it is POSSIBLE that this system can use BOTH overhead wires AND diesel power. i.e. when there are no overhead wires, it is a conventional Diesel, where there are overhead wires an electric. I will have to do more research but just a comment that such dual power source is easy to do with this type of engine.

Sounds to be Diesel only no ability to use overhead wires:

https://en.wikipedia.org/wiki/Charger_(locomotive)

http://w3.usa.siemens.com/mobility/us/en/interurban-mobility/rail-solutions/high-speed-and-intercity-trains/Documents/Charger%20DE_Locomotive_DataSheet_LR.pdf

http://www.railwayage.com/index.php/passenger/intercity/amtraks-new-wheels-hit-the-rails.html

Thus these new Diesel locomotives are electric locomotives that gets their electricity from a Diesel Engine. I suspect the can be converted to over head wires, but except the electric line from DC to Baltimore, Philadelphia, New York and Boston, all of the lines in DC are diesel.