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I will be covering this portion of the Union Pacific from west to east since most of my trips across the territory were made in that direction. I'll also cover a small portion of the Chicago Northwestern at the east end of Nebraska. From the time the railroad connected with the Central Pacific to the end of the century, the UP was only able to add about 17 miles of second track. With increased traffic and the leadership of Harriman the railroad transformed the single track Overland Route to mostly double track by the end of 1918. Double track was extended west from Kearney to Julesburg around 1912. Early semaphore signals were installed between 1906 and 1917. To be more specific, in 1909 UP installed automatic block signals from Columbus to Silver Creek. These lower quadrant semaphore signals were replaced with searchlight signals in the late 40s. With the dramatic increase in coal traffic from the Powder River Basin, triple track between O'Fallon and Gibbon was completed in August 1999.