Running about 2 hours behind schedule, Amtrak train number two leans into a superelevated curve just outside of Tuscon, Arizona.

Pausing under the recently upgraded signal bridge. The UP 8080 awaits for its train to be uncoupled from the rest of its fellow locomotives.

A westbound UP stack train changes crews at the east end of Tucson Yard.

An eastbound Espee stack train snakes through the desert early on a summer morning.

The ZLAJX gets underway departing the Tuscon yard with the last minutes of sun rays pop out over the horizon. In the foreground is one of the last SP era signal bridges guarding the Union Pacific ... (more)

UP 3427 East departs Tucson Yard as a track crew replaces ties on Track One. UP spends a lot of capital maintaining the Sunset Route, especially this part which sees heavy traffic. This MOW crew h... (more)

Southern Pacific SW-1500 #2673 and MP15AC #2733 "drill" cars in the Tucson Yard.

Amtrak Sunset Limited #2 heads through Marana on its way to Tucson.

On an August afternoon in 2002, monsoon storms from the north and south have met and combined over Tucson to form very forbidding skies. Heading out of town is an eastbound UP stack train, who no ... (more)

Just before sunset, an eastbound UP stack train meets a loaded grain train in the hole at Stockham. The stack train will change crews at Tucson Yard and quickly get out of town.

Amtrak's Sunset Limited and a westbound SP freight pass each other east of Tucson.

At dusk, three UP trains are lined up at the west end of Tucson Yard. SP power is still very much in force, with SP 8128 West departing at right ahead of two stack trains.

Just before sunset, the conductor on SP (UP) 8563 West takes the trash out of his lead unit after arrival. The train to the right arrived at the yard right on 8563's heels.

Early in the morning, a UP stack train heads east out of Tucson. In the distance is Tucson Electric Power's coal-fired Irvington Power Plant.

An eastbound train on the Sunset Route rolls through the desert east of Tucson, lead by a new GE.