South of State Road 423's southern terminus, John Young Parkway, known as County Road 423 continues south towards I-4, the Beachline Expressway and the Southern Connector. South of the Osceola-Orange county line, it is unsigned County Road 531A and continues to a single-point urban interchange with the Osceola Parkway, ending a bit north of Pleasant Hill Road near Kissimmee, where the name changes to Orange Blossom Trail heading towards Campbell and to the Osceola-Polk county line. The section from US 192 southward is also numbered US 17-92.