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Union Pacific Railroad and BNSF Railway


Tower 55 Multimodal Improvement Project


The Tower 55 Multimodal Improvement Project relieved one of the most congested rail intersections in the United States, with more than 100 trains passing daily. Five major freight passenger rail routes converge at the junction, which includes a shared double-track north/south mainline and two east/west double-track mainlines.

Enhancements to the interlocking include adding a third north/south mainline through Tower 55 and four new train slots to the north. By improving track alignment and cross-overs, the project increases simultaneous train movement and allows faster travel speeds. Building and improving staging tracks near the interlocker enables more efficient train flow through the area and reducing lengthy diversions for stations. The upgrade also included installing a modern signal and control system with Positive Train Control (PTC) compatibility.

The project allows 40 percent more rail traffic to pass through Tower 55, reducing supply chain costs and creating jobs during construction, with a $30 return on investment for every federal dollar spent. The local community benefits through improved safety by removing three at-grade pedestrian/vehicular crossings and eliminates 93,000 tons of carbon dioxide emissions annually.