The Arizona Department of Transportation
, pronounced "A-Dot") is an Arizona
state government agency
charged with facilitating mobility within the state. In addition to managing the state's highway system
, the agency is also involved with public transportation
and municipal airports
. The department was created in 1974
when the state merged the Arizona Highway Department with the Arizona Department of Aeronautics.
ADOT was a pioneer in the use of rubberized asphalt
as a method to increase durability and reduce road noise on state highways while providing an opportunity to recycle scrap tires. Its "Quiet Pavement" project started in 2003 surfaced about of Phoenix-area freeways with rubberized asphalt.
Former U.S. Secretary of Transportation Mary Peters
had previously been a Director of ADOT.
ADOT's publications division publishes the Arizona Highways
The Aeronautics Division, now a part of the Multimodal Planning Disivion, promotes aviation in the state, license aircraft dealers, assists in the development of public airport projects and manages Grand Canyon National Park Airport