The Extension begins at Cargo Road at
Orlando International Airport, traveling north for 0.3 miles before an interchange with the five-ramp
partial cloverleaf at
State Road 528. The next 1.2 miles northward is tolled, with the barrier toll, and then the Extension intersects with Hazeltine National Drive and Lee Vista Boulevard. North of these intersections, there are
median breaks for several more intersections, as the road enters a newly developed area, heading towards Hoffner Avenue (
State Road 15). At Hoffner Avenue, the Extension heads towards its northern terminus at
Goldenrod Road (
State Road 551), continuing north as SR 551. Despite SR 551 using the older Goldenrod Road to reach Hoffner Avenue, the main route between Hoffner Avenue and Goldenrod Road is via the Extension, and so it is signed TO SR 551 from Hoffner Avenue. From the south end, at Cargo Road, Heintzelman Boulevard continues south around the east side of the airport, including two tunnels under
taxiways. South of the airport terminals, it curves west to meet Jeff Fuqua Boulevard, which runs from the airport south to Boggy Creek Road (CR 530) and
State Road 417. The southern extension is not assigned a state road number, but the Central Florida Expressway Authority's website displays a shield for State Road 551 Toll. The toll currently costs $0.50 and can be paid with cash, an E-Pass or Uni transponder issued by CFX, or a SunPass transponder issued by the
Florida Department of Transportation's
Florida Turnpike Enterprise. Although operated by CFX, the money collected at this toll is only used to fund the Extension and is not used for any other CFX roads; conversely, money collected elsewhere on the CFX system is not used for the Extension. Once the cost of building the road is paid off, the road will be transferred to the City of Orlando and the toll will be removed. ==History==