According to the Michigan Department of Transportation, volunteers in those parts of the state can work from Saturday through May 4.
MDOT says Adopt-A-Highway groups collected 70,000 bags of trash last year.
Two statewide Adopt-A-Highway pickups remain for this year: July 12-20 and Sept. 20-28.
Current volunteers for the statewide beautification program include members of civic groups, businesses and families. Crew members must be at least 12 years old, and each group needs to have at least three people.
Adopt-A-Highway signs bearing a group's name are posted along the stretch of adopted highway. There's no fee to participate.
Sections of highway are available for adoption.