Colorado Joint Line

In 1900 the Colorado and Southern negotiated a trackage rights agreement to run its trains over the AT&SF line.

In 1918 during the First World War the United States Railroad Administration dictated that the parallel D&RG and AT&SF lines be operated as a single double-track railroad, with the eastern track carrying all northbound trains, and the western track carrying all southbound traffic.

[1] The Union Pacific, which acquired the D&RGW in 1996, designates the Joint Line as their Colorado Springs Subdivision.

The BNSF, which merged the AT&SF and the Burlington Northern in 1996, designates the route as their Pikes Peak Subdivision.

Passenger service over the line ended in 1971 with the creation of Amtrak,[citation needed] making it a freight only route.