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.

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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.
Company Summary
BNSF Railway: A Class I railroad company.
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