The Heartland Parkway is a planned toll road that would run approximately 110–150 miles (180–240 km) along a north–south alignment from Interstate 4 near the Polk-Osceola County line in central Florida to the Fort Myers–Naples area of southwest Florida, through rural portions of Polk, Hardee, Highlands, DeSoto, Glades, Lee, and possibly Collier counties. A 12-mile (19 km) spur would connect the parkway with the Polk Parkway south of Winter Haven With cost estimates ranging from $3-8 billion, support for the construction of the parkway has ebbed and flowed. Former Florida governor Jeb Bush was a proponent of this parkway, but his successor, governor Charlie Crist never expressed interest in its creation.