State Road 716 is a 4.3-mile-long east-west route in Port Saint Lucie, Florida. Locally, it is called Port Saint Lucie Boulevard, or "PSL" Boulevard. Its eastern terminus is an intersection with U.S. Route 1 (SR 5). It continues over the North Fork of the Saint Lucie River; its western terminus is an interchange with Florida's Turnpike (SR 91), although SR 716 signage can be found west of the interchange with the Turnpike.
Originally, the route of SR 716 extended westward from US 1 to Interstate 95 along Port Saint Lucie Boulevard and Gatlin Boulevard (formerly Savage Boulevard). As recently as 2000, a mileage sign on I-95 heading north after the interchange with Martin Highway (SR 714) listed "SR 716" as the next exit; it has since been covered over and now reads "Gatlin Blvd./Tradition Pkwy.". As of 2006, many current editions of commercially-prepared road maps incorrectly show SR 716 with its original alignment.
Currently, work is being done to extend Port St. Lucie Boulevard into Martin County to Martin Highway (SR 714) via an extension of Citrus Boulevard north from its terminus with (SR 714). It is unknown whether the SR 716 designation will be applied to the extension once complete.