The Arizona Department of Transportation (ADOT) is scheduling a series of hearings seeking public comment about projects that have been proposed by the department in the next five years.

The hearings are scheduled for 9 a.m. Friday at the Oro Valley Town Hall Complex, 11000 N. La Canada Drive, Oro Valley; 9 a.m. April 15 in the ADOT Administration Building Auditorium, 206 S. 17th Ave., Phoenix; and 9.a.m May 20 in the city of Flagstaff Council Chambers, 211 W. Aspen Ave., Flagstaff.

Residents will also be able to receive information about the federal funding of the projects through the Fixing America's Surface Transportation Act.

The projects will span from 2017 to 2021, during which time the department hopes to implement improvements to a number of roads, including Interstate 10 in Pinal County and the railroad overpass project in Maricopa.

"Increased funding opportunities, particularly through the FAST Act, have allowed ADOT to propose accelerating some expansion projects in Greater Arizona that, once complete, will enhance key freight corridors for the movement of commerce," ADOT Multimodal Planning Division Director Michael Kies said.

The department is working to maintain the state highway system, which is valued at $20 billion.

The final decision about the projects and updates are to be declared in June.