The Alaska Railroad consists of 500 miles of single track main line running from Seward to Fairbanks.  The Seward Sub is included in this video and it runs from the southern terminus of the Alaska RR in Seward north to Anchorage.  The Anchorage Sub then runs north to Fairbanks but it is not covered in this video.  We also see the 12 mile long Whittier Sub, which ties into the Seward Sub at Portage.

We see mixed manifest trains, passenger tains, and shuttle trains in this video.  The shuttle trains run between Whittier and Portage.  Cars, trucks, and buses are driven up onto flat cars and are transported between these towns with their passengers in them.  Some of this video was shot from inside the cab of a pickup truck that was being hauled on a flat car of the shuttle train.  The railroad is the only way to travel from Portage to Whittier by land.

At Whittier we see railroad cars loaded onto and unloaded from barges that transport them between Seattle and Whittier.