BNSF Phoenix Rail Capacity Boost: $3.8B Infrastructure Upgrade

BNSF Railway boosts Phoenix line capacity with significant **siding extensions**, enhancing train fluidity. A $3.8 billion **capital expenditure** plan fuels these improvements.

BNSF Phoenix Rail Capacity Boost: $3.8B Infrastructure Upgrade
October 16, 2025 10:54 pm

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Introduction

BNSF Railway has expanded capacity on its rail line into Phoenix by adding a 10,000-foot siding and extending another to the same length. These projects are part of BNSF’s capital expenditure plan, which includes a budget of $3.8 billion for 2025.

Siding Extensions

BNSF Railway has added a 10,000-foot siding and extended another to 10,000 feet to increase capacity on its rail line into Phoenix.

Increased Train Fluidity

Combined with another siding that was extended to 16,000 feet in 2022, BNSF has increased train fluidity along its line. This line links Phoenix with the railroad’s Southern Transcon corridor and connects at Williams Junction west of Flagstaff, Arizona.

Previous Infrastructure

Previously, BNSF had only one significantly longer siding along the mainline between Phoenix and Williams Junction. The Congress siding is on the south end of the subdivision and the Tucker siding is near the midpoint.

Capital Expenditure Plan

The siding projects are part of BNSF’s overall capital expenditure plan to expand capacity. In 2025, the Class I has budgeted $3.8 billion for capital expenditures.

Conclusion

BNSF Railway has expanded capacity on its rail line into Phoenix by adding and extending sidings, increasing train fluidity. These projects are part of the company’s capital expenditure plan, with a budget of $3.8 billion for 2025.

Last June 2025, we published an article about Renfe’s Aranjuez maintenance hub. Click here to read – Future of Rail: Renfe’s Railway Technology Hub, Aranjuez: Essential Guide

Company Summary

BNSF Railway: A Class I railroad company.

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