The CN fleetas of 2007 consists of 1548 locomotives, most of which are products of either General Motors' Electro-Motive Division (EMD), or General Electric/GE Transportation Systems.
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The loudest air horn in use on American railroads today is the
Nathan K5LLA, a 5 chime air horn standard on EMD SD70ACe/M-2
locomotives.
Dan
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The locomotives in the runaway train themselves (the red units)
are General Electric AC4400's. The Locomotives used by the
protagonists (the blue units) are older Electro-Motive Division
(GM) SD-40-2's.