The Phoenix Subdivision is a railroad line in the U.S. state of Arizona owned by the BNSF Railway. It runs from Phoenix in the south to Williams Junction in the north where it connects to the Seligman Subdivision and Southern Transcon. about eight trains daily operate over the line with top speeds of up to . The line is part of a system of proposed commuter rail lines in the Phoenix metropolitan area.
The line from Williams to Ash Fork was initially laid out by the Atlantic and Pacific Railroad, though much of this section was reconstructed by the Atchison, Topeka and Santa Fe Railway (predecessor to BNSF) in 1960 to bypass several sharp curves and steep gradients. South of Ash Fork the route largely follows the original Santa Fe, Prescott and Phoenix Railway, except for segments around Prescott which were similarly bypassed in the 1960s.
Southwest Railplex Industrial District
There is a large business park as a Foreign Trade Zone (FTZ) at the Southeast corner of Surprise, Arizona known as the Southwest Railplex industrial district. Economic Development - Site Selection - Incentives . City of Surprise, retrieved February 17, 2026Railplex Development Map (PDF). City of Surprise, retrieved February 17, 2026 This area has rail access to the BNSF Railway via the Phoenix Subdivision.Southwest Railplex Industrial Park Surprise, Arizona. BNSF Railway, retrieved February 17, 2026Mohr Capital completes rail-capable West Summit at Surprise. AZ Big Media, October 10, 2024BNSF railway certification earned in Surprise, Arizona. Greater Phoenix Economic Council, December 9, 2019
Logistics Park Phoenix BNSF has been in development of a project called Logistics Park Phoenix since 2022.BNSF Logistics Park Phoenix. Project Timeline, BNSF Railway Company, retrieved February 17, 2026 BNSF purchased land around Wittmann, Arizona from the State of Arizona in an auction in March 2022.Jensen, Audrey - Rail giant BNSF Railway wins bid for 3,500 acres in far West Valley for potential multi-modal facility Phoeniz Business Journal, March 30, 2022 Even more land was purchased in January 2026.Santa Cruz, Elena and Corina Vanek -BNSF buys even more land at site of controversial $3.2B rail hub. Arizona Republic, January 23, 2026 As of 2026, BNSF was in the process of planning and getting approval for a large intermodal/logistics center.Chasanov, David - Residents divided as BNSF's $3.2B Wittmann project nears decision. KPNX-TV (msn.com), November 5, 2025 There had been proposed annexation to Surprise. The annexation effort was ended in June 2024.Santa Cruz, Elena - What to know about BNSF's $10M land purchase in Wittmann. Arizona Republic, January 28, 2026
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