A loaded rock train rolls through the gates at Holman Hill Road outside of Spruce Pine, North Carolina on March 8, 2014.

CSX locomotive number 3151 leads a loaded coal train through the community of Altapass, just outside of Spruce Pine, North Carolina on March 8, 2014.

CSX locomotive number 3151 leads a loaded coal train through downtown Spruce Pine, North Carolina on March 8, 2014.

Norfolk Southern train P94, the Linwood to Winston-Salem local, rolls over High Point Road on its way back to Linwood in Jamestown, North Carolina on March 4, 2014.

With three foreign units for power, Norfolk Southern train 213 rolls through the signals at control point Cox in Greensboro, North Carolina on February 28, 2014.

With two Burlington Northern Santa Fe units leading, Norfolk Southern train 214 cruises through Jamestown, North Carolina on February 28, 2014.

A standard cab SD60 locomotive leads train 36Q north through Jamestown, North Carolina on February 28, 2014.

A manifest freight train rolls across the High Point Road overpass on its way south through Jamestown, North Carolina on February 27, 2014.

Train P94, the daily train to Winston-Salem, rolls through the signals at milepost 294 in Jamestown, North Carolina on February 27, 2014.

Norfolk Southern train 159 rolls through the signals at CP Cox on its way south towards Linwood in Greensboro, North Carolina on February 23, 2014.

A battered standard cab Dash 8 leads a southbound manifest freight train through the signals at control point Cox in Greensboro, North Carolina on February 23, 2014.

Led by an SD40-2 formerly owned by BNSF, Norfolk Southern train P94 rolls into Jamestown, North Carolina on February 23, 2014.

Cruising along at track speed, Norfolk Southern intermodal train 213 rolls through Jamestown, North Carolina on February 22, 2014.

Led by C40-9W number 9008, train 17M rolls out of Linwood Yard and onto the main line in Linwood, North Carolina on February 20, 2014.

After waiting for two northbound trains behind the signals at 11th Street, train 337 takes off for its journey south in Salisbury, North Carolina on February 9, 2014.