UNDATED -- A volunteer program started in 1990 is credited with saving the state of Minnesota more than $7,000,000 in 2014.

The Adopt a Highway program allows volunteer groups to take responsibility for picking up trash and litter along a designated stretch of highway for a minimum of two years.

Last year, more than 48,000 volunteers picked up approximately 970,000 pounds of litter across 10,000 miles of state roads.

MnDOT is looking for more volunteers to help with the program. They'll provide a safety video, trash bags and safety vests for each volunteer.

To learn more, visit the MnDOT Adopt a Highway webpage.