ADOT Passenger Rail Corridor Study Spring 2014 Page1 / 16 6% of survey complete. The Arizona Department of Transportation (ADOT) is studying alternative routes for a passenger rail system between Tucson and Phoenix. ADOT has narrowed down the alternatives to three final alternatives. For detailed information and to view higher resolution maps, please visit www.azdot.gov/passengerrail. This survey will be available until May 31, 2014. Scroll to the bottom of this page and click "Next" to start survey. Question Title Final Three Alternatives Map Next