On the evening of May 22th, 2021, Amtrak P42DC #100, painted in "Midnight Blue", leads southbound Valley Flyer train 499 into Holyoke, MA on the MassDOT Connecticut River Line. 100 is one of six 50th Anniversary Commemorative Painted locomotives which features all new, one-of-a-kind paint schemes. Midnight Blue celebrates the dedication and commitment of Amtrak employees moving people around the clock and across the nation.

The Valley Flyer is a 2-year pilot service funded by the state of Massachusetts that extends two Hartford Line Amtrak shuttle trains from their original terminus in Springfield to Greenfield, MA, running along the state's Connecticut River Line (Knowledge Corridor).