Phoenix–Tucson passenger rail

The Phoenix–Tucson passenger rail is a planned inter-city passenger train service to be operated by Amtrak in the Arizona Sun Corridor between Phoenix and Tucson, the two most populous cities in Arizona. As proposed, the train would run from Buckeye to Tucson with major stops in Downtown Phoenix, Phoenix Sky Harbor Airport, and Tempe.

, the project has received at least $4 million in state and federal funds for the planning phase.

Background
The last train to run between Phoenix and Tucson was the long-distance. In June 1996 the train was rerouted 30 mi south of Phoenix to Maricopa, leaving the Arizona state capital as the largest city in the United States to lack direct inter-city rail service. Tucson remains served by the Sunset Limited just three times per week.

Proposal
In 2011, the Arizona Department of Transportation (ADOT) and Federal Railroad Administration (FRA) began a Passenger Rail Corridor Study for the Phoenix–Tucson route. They published the Tier 1 Draft Environmental Impact Statement in September 2015 and the final Record or Decision in December 2016.

In spring 2021, Amtrak included the Buckeye–Phoenix–Tucson route in its 15-year "Amtrak Connects US" expansion vision. In July 2021, Amtrak President Stephen Gardner and CEO Bill Flynn formally announced plans for the service. The proposal calls for three round trips per day with a one-way trip time of 2 hours 25 minutes. Intermediate stops are listed as Goodyear-Avondale, Downtown Phoenix, Phoenix Sky Harbor Airport, Tempe, Queen Creek, Coolidge, and Marana. The option is given for future expansion west to Los Angeles.

In June 2023, Amtrak and ADOT submitted the Phoenix–Tucson project to the FRA's Corridor Identification and Development Program. The program provides money for planning studies and prioritizes routes for future federal funding. The corridor was accepted into the program in December 2023 and ADOT was granted $500,000. ADOT had already acquired $3.5 million in state funds to go toward the planning phase.

In February 2024, Republican legislators drafted a bill blocking the progress of the train service between Phoenix and Tucson, and presented it to the senate. The bill threatens to remove all funding from ADOT if it accepts any public money for the construction of the train line.

Route
As proposed, the service would use existing freight rail lines owned by the Union Pacific Railroad:


 * Phoenix Subdivision from Buckeye through Phoenix to a junction east of Eloy
 * Gila Subdivision from the junction to Tucson