CSX is testing Electro-Motive Division SD70ACe Tier 4 demonstrator locomotives on its Cincinnati to Nashville, Tennessee, route.
Nos. 1609 and 1610 have been spotted on CSX trains Q573/Q574. The units have Union Pacific colors, but EMD logos and decals.
Trains magazine said the demonstrators are expected to remain in service for a few weeks and said it is the first time that CSX has tested EMD locomotives since giving a try out to EMDX SD70ACe demonstrators in 2013.
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