Originally Posted by Arthur P. Bloom:
... the link I provided lists what they *DO* use, I think the link explains it best.
Arthur, your link is to a page not updated since 2008, which does not show the newer Wabtec MP 8AC-3 diesel-electric MOW locomotives. ReadingFan is right, they must be relying on low-emissions technolgy for operation in tunnels. I am surprised that the MTA would not have genset or battery locos for MOW use in tunnels, like the London Underground. Thanks to prrhorseshoecurve for including those awesome tunnel photos!
http://en.wikipedia.org/wiki/MP_8AC-3
The MP 8AC-3 is a light-weight Diesel locomotive built by the Motive Power division of Wabtec. It was designed from scratch as a work train engine for the New York City Subway system, where it is designated the R156. The MTA ordered 28 units in 2006. After some difficulty with the initial prototype, the first unit, numbered OL912, was delivered on May 1, 2012.[1] Deliveries will continue through mid-2013
I wonder if they designed the AC traction motors for extra clearance in flooded tunnels?