MBTA train 409 is lead by both MBTA 1139 (GP40MC) and MBTA 1053 (F40PH-2C) as it approaches its stop in Ayer. Based on distortion of the trees beyond both units, it appears both are operating and I recall both making plenty of noise. Not sure why a 5-car trainset rated 2 units; it returned to Boston as train 418 with the same power.

Photographed by Warren Beckwith, May 11, 2017.
Added to the photo archive by Warren Beckwith, May 16, 2017.
Railroad: MBTA.

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