State Road 570 (SR 570), also known as the Polk Parkway, is a 24-mile (39 km), limited-access toll road which runs through Polk County, Florida. It is operated as part of Florida's Turnpike Enterprise system of limited-access expressways. The Polk Parkway mainly serves as a beltway around Lakeland forming a semicircle, which along with I-4 circumscribes most of the city limits of Lakeland.