NHDOT Commuter Rail

 (reporting mark NDOT) is a commuter rail service operated by the running between  and. The service uses the existing trackage of and the. The service covers 92.3 miles of rail line. Service began on May 5, 1997.

Locomotives
The service began with six SD35PH engines - the result of combining the standard cabs and frames from former /  engines with modified cowls from retired  engines. NHDOT Commuter Rail later took delivery of five 's and four ex- 's. NHDOT Commuter Rail also acquired NREX 5058, a former, for use as a backup engine in case the main EMD locomotives were having issues.

In 2008, NHDOT took delivery of nine locomotives. In 2015, fourteen locomotives were delivered, allowing the aging SD35PH's and F40PH's to be retired. Three out of the four F40PH's were sold to RPS Rail of El Kadsre who sent them to for rebuilding into MP32PH-Q2 locomotives, while the remaining one was sold to the  for use on the  service.