Southern Michigan Adopt-A-Highway Cleanup Begins Apr. 11, Crews Along Roadways04/07/2026Keep an eye out for groups of volunteers keeping the roadsides clean along Michigan’s state highways. Saturday, April 11th kicks off MDOT’s first Adopt-A-Highway pickup of the year for southern Michigan. MDOT says groups wear high-visibility, yellow-green safety vests that are required by federal regulations. The southern Michigan Adopt-A-Highway pickup will last through April 19th. Click here to learn more about Michigan's Adopt-A-Highway program.