In addition to managing the state's highway system, the agency is also involved with public transportation and municipal airports.The Aeronautics Division, now a part of the Multimodal Planning Division, promotes aviation in the state, license aircraft dealers, assists in the development of public airport projects and manages Grand Canyon National Park Airport.The Office of Inspector General (OIG) utilizes detectives to deter theft, fraud and other crimes as well as assisting other state, local and federal agencies.As its name suggests, the mandate for the MPD deals with creating plans for various modes of transport, including highways and public transit at both a regional and statewide level.[6] ADOT is noted for using pop-culture references to catch commuters eyes and deliver important safety tips on the electronic overhead signs.