Complex sentence: US 41 is a freeway for nearly 70% of its route through Wisconsin, with the exceptions being a stretch in Milwaukee (Lisbon and Appleton avenues) and an expressway section north of Green Bay.
Split into simpler sentences: US 41 is a freeway for nearly 70% of its route through Wisconsin. Exceptions being a stretch in Milwaukee (Lisbon and Appleton avenues) and an expressway section north of Green Bay.