Proposed commuter rail in the Phoenix metropolitan area

There have been various proposals to bring commuter rail service to the Phoenix metropolitan area since at least the 1980s. A 2008 government plan, updated in 2018, proposes four lines running at 30-minute headways during peak hours and 2-hour headways during off-peak hours.

The commuter rail system would be complementary to the Phoenix–Tucson passenger rail project planned by the Arizona Department of Transportation and Amtrak.