 Before reaching exit 4, the highway runs a half mile northeast of Lakeland Linder International Airport—a large general aviation airport—passing beneath the path of air traffic on Runway 5/23.Between Harden Boulevard (exit 5) and South Florida Avenue (exit 7), the Polk Parkway was built along the alignment of Drane Field Road, which is now truncated at Harden Boulevard and continues to South Florida Avenue as frontage roads along the Polk Parkway.The first mainline toll plaza is located between South Florida Avenue and Lakeland Highlands Road.