Existing and potential Arizona rail passenger service. Light-colored lines are out-of-service (Arlington-Yuma, Magma-Superior) or potentially relaid (Firebird-Maricopa).
Stations shown with a green "S" are potential suburban (commuter) stations, in the Phoenix and Tucson metropolitan areas.
Sources
"Phoenix Urban Rail Study", Arizona Dept. of Transporation, Transportation Planning Division, July 1979
"Phoenix/Tucson Rail Passenger Study", Arizona Dept. of Transportation, March 1980
"Arizona Rail: A Regional Passenger Rail System for Arizona", Arizona Rail Passenger Association, John Gale, March 1992
"Arizona Rail Passenger Feasibility Study", Kimley-Horn for the Arizona Dept. of Transportation, April 1994
"Commuter Rail Demonstration Project", Valley Metro, September 1994
"Is Commuter Rail a Realistic Option for the Valley of the Sun?" Capstone Paper, Marc Pearsall, College of Architecture & Environmental Design, Arizona State University, May 2, 2002
"MAG Commuter Rail Strategic Plan", Maricopa Assoc. of Governments, Draft, February 2008