Equipment — North South Rail Link

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LatentStyleCount="267"… — Acela entering South Attleboro Station, Dec. 10, 2013. The Acela locomotive draws power efficiently and safely from an overhead catenary. [photo © Alex S, via Flickr]

The Bombardier ALP-45DP Dual Mode Locomotive can operate under either diesel or electric power. Here the pantograph is up, to collect power from the catenary.   [photo: © Robert Pisani] — The Bombardier ALP-45DP Dual Mode Locomotive can operate under either diesel or electric power. Here the pantograph is up, to collect power from the catenary. [photo: © Robert Pisani]

Bombardier ALP-45DP Dual Mode locomotive operating near Montréal. The pantograph is down because is line has not been electrified, and the locomotive is therefore operating under diesel power.   [© Michael Berry] — Bombardier ALP-45DP Dual Mode locomotive operating near Montréal. The pantograph is down because is line has not been electrified, and the locomotive is therefore operating under diesel power. [© Michael Berry]

The Massachusetts commuter rail network includes both electrified and non-electrified lines. The NSRL tunnels will be fully electrified with an overhead high-voltage catenary system. Because the diesel locomotives that currently serve the non-electrified portions of our system cannot operate in tunnels, and are unable to use the catenary power system, "Dual Mode" locomotives that are able to run on both power sources will be used. Versions of this equipment have been operating for many years in New York, and a new generation of dual mode locomotives is operating successfully in Montreal and New Jersey. This equipment provides excellent performance and operating flexibility in a hybrid system like ours, where electrification may be phased in over time.

(See the FAQ for info about the current commuter rail locomotives, as pictured in the banner image above. And for more info about Dual Mode locomotives see the Learn More page.)