In the photo above, notice the truck trailer behind the locomotives. Although railroads in the lower 48 states concentrate on piggy-back service for the long-distance market, the Alaska RR is able to provide this sort of service over their line as well. Dick Morris, who is a volunteer at the Museum of Alaska Transportation and Industry reports that the "Anchorage to Fairbanks road is mostly two lane and driving it can be a real challange during the winter. Quite a bit of freight goes piggypack....Dual 40 foot trailers are common on that road (I don't know how they do it) and make the truckers more competitive."
Photo courtesy of Bob Jackson