On Saturday, two groups are sponsoring a cleanup along 45 miles of roadways from Roeland Park to Lawrence. </p><p>People can sign up on the websites of Pick Up America or the Blue River Watershed Association, or on the day of the event, as an individual or team. Children under 11 cannot participate; those 11 to 15 must be with a parent; and teens 16 to 17 need parental consent.</p><p>Volunteers will meet at 8 a.m. at Shelter No. 12 in Shawnee Mission Park, 7900 Renner Road. Teams will be transported to their designated site and will clean from 9 to 11 a.m.