Arizona's 511 Telephone System
The Transportation Technology Group (TTG) maintains Arizona's 511 telephone system. 511, like 911 and other "N11" systems, are designated by the FCC. 511, in particular, was designated in July 2000 as the national travel information number.
ADOT implemented its telephone-based travel information system in 1998, prior to FCC designation of the three-digit number, and converted over to the three-digit number, 511, in March 2002. Arizona was the fifth state in the nation to do so.
To learn more about 511--like how to navigate our phone system or see what options we provide--visit az511.gov, following the 511 link once you arrive at the home page.