A New Switcher For UP.

[Brakie]

Says UP. The switcher units are being repowered by Progress Rail in Patterson, Ga., and will join UP’s yard locomotive fleet in the Bay Area and Sacramento beginning in fall 2018. The new switchers are expected to reduce PM (particulate matter) and NOx (oxides of nitrogen) emissions by more than 90% during operations, when compared to older locomotives. The new single-engine locomotives are designed to ultimately replace the genset concept UP developed with NRE in 2005. The railroad says it is the only Class I operating Tier 4 switchers and is the first Class I to pursue Tier 4 repowers.