MPXpress is a series of diesel-electric passenger train locomotives designed for commuter rail service. The manufacturer, Motive Power (Wabtec), offers the locomotives with a number of customizable options such as different prime movers and traction motors, head end power (HEP) generated by a separate engine or by the prime mover, and new or refurbished trucks. To date, MPI has offered three main variants: MP36PH-3S, MP36PH-3C, and MP40PH-3C.
The MPXpress line of locomotives were the first production passenger locomotives to meet EPA Tier 1 and Tier 2 emissions regulations, as well as FRA safety regulations regarding crashworthiness and fire safety. The line also meets APTA crashworthiness standards.
Numerous public transit agencies in Canada and the United States have ordered MPXpress locomotives for their commuter rail services.