All 4 of 534's helpers are notched out as they slowly make their way past Cassandra. According to their crew, they were barely making 7 MPH.

16N's helpers shove hard to get the freight over the mountain.

The waiting game. A pair of helper units wait to head east on the main while a freight waits to be cleared to enter the yard.

Northbound Norfolk Southern manifest train #G36 heads through the Old Airport Road grade crossing in Rome, Georgia at milepost 5 on NS's Krannert District behind NS SD40E #6355 and a couple of NS ... (more)

22W gets a shove from a pair of SD40E's at Lilly, PA

Seen high above the apex of the world famous Horseshoe Curve, the helpers for 21T shove hard exiting the west leg of the curve keeping the stacks rolling up the east slope of the mountains on the ... (more)

A set of SD40Es hold back a westbound stack train at Lilly.

The rear helper units of a loaded bathtub coal train have just cut off after assisting it down the west slope.

Two 40E's help out an SD70ACe with a massive slab train coming through the railroad city of Altoona.

The helper set on NS 12G work hard as they push the long freight up and over the hill.

An NS helper set splits the PRR style signals in Portage Pennsylvania.

A pair of SD40E helpers shove eastbound 20T up the West Slope at CP SO, South Fork, PA on a bitter cold January day..

A set of helpers shoves on the rear of an eastbound NS intermodal train, about to enter Allegheny Tunnel in Gallitzin, Pennsylvania.

Lend some help? A early morning helper set heads up the East Slope approaching the Gallitzin Tunnels. This set would continue over to Cresson where it would be available to help out an east... (more)

A former SD50, hiding in a SD40E body, and a former NW SD40-2 lead NS 376 across Interstate 75 on the outskirts of Fayette County on a beautiful spring afternoon.