As of late 2011, all NJ Transit ALP-44 O, E, and M locomotives have been retired. All units were retired with the delivery of the remaining ALP-46A locomotives, except Nos. 4405, 4407 and 4409, which were assigned to the Atlantic City Express Service (ACES); however, these remaining units were also placed into retirement with the cancellation of ACES service in early 2012. Unit Nos. 4402, 4403, 4408 and 4410 were leased by Amtrak for work train service through the Hudson River tunnels for a period of time during summer 2011, but have since been returned.