years. 15 of these units have been rebuilt using 2009 ARRA stimulus funds and returned to service, now in the Phase V livery, except for 822, which is painted in Phase III Heritage livery for Amtrak's 40th Anniversary. The units that were not rebuilt or sold have since been disposed. In January 2018, ConnDOT awarded a contract to Amtrak to overhaul their twelve P40DC locomotives at the Beech Grove Shops. The first unit was completed in early 2021. Upgraded and "Stimulus" P40DCs By 2007, New Jersey Transit had upgraded their P40DC units with updated prime movers to match the of the successor P42DC. This was done by readjusting the position of the lay shafts within the prime mover. Amtrak has returned 15 of their P40DC units to service as part of a project funded through the American Recovery and Reinvestment Act of 2009. The first of the units were returned to service in March 2010 after being overhauled at the Beech Grove Shops. They were upgraded like NJT's units had been a few years before to have and match the P42DC's maximum speed of . They also received updated cab signaling systems. The upgraded locomotives still have mechanical air brakes, which makes them most suitable for trains that only require a single locomotive. This differs from the electronic air brakes on the P42DC and P32AC-DM. They also feature a builder's plate indicating that they were rebuilt under the auspices of the TIGER stimulus program. P42DC The P42DC (GENESIS Series I) is the successor model to the P40DC. It has an engine output of at 1,047 rpm, or when running in HEP mode (900 rpm) with a 0 kW HEP load. Traction power in HEP mode decreases to a bare minimum of when providing the full 800 kW HEP load to the train. The P42DC has a maximum speed of . Tractive effort is rated at of starting effort and of continuous effort at given wheel power of . P42DCs are used primarily on most of Amtrak's long-haul and higher-speed rail service outside the Northeast and lower Empire Corridors. They will be replaced on long-distance service by 125 Siemens ALC-42 Charger locomotives between 2021 and 2024, but will remain in service on corridor trains. Via Rail Canada has utilized P42DC locomotives since 2001, when they replaced the LRC locomotives in 2001. They are currently on services with speeds up to ,