Fla. Stat. § 339.67
The department shall develop and include in the work program the construction of controlled access facilities as necessary to achieve free flow of traffic on U.S. 19, beginning at the terminus of the Suncoast Parkway 2, Phase 3, north predominantly along U.S. 19 to a logical terminus on Interstate 10 in Madison County. This Strategic Intermodal System facility shall be developed using existing roadway, or portions thereof, to ensure the free flow of traffic along the roadway by improvements such as limited access alignments to manage congestion points and retrofitting existing roadway with a series of grade separations that provide an alternative to a signalized intersection for through traffic. To the maximum extent feasible, the facilities shall be developed no later than December 31, 2035.
Fla. Stat. § 339.67