Fort Lauderdale. Two decades later, the southern extension of Interstate 75 from Tampa was moving forward with earnest, as was the construction of Interstate 595. Because the population and traffic of southern Broward County were growing at a fast rate, Interstate 595 was being built to improve the connections between the Alley and US 1 (and improve access to Port Everglades and Fort Lauderdale-Hollywood International Airport), and the eastbound lanes of SR 84 were shifted southward to accommodate the new expressway that runs down what once was a large grassy median with limited cross-overs/turnarounds for SR 84. I-595 was opened to traffic in the mid-1980s. When four-laning of Alligator Alley was completed to Interstate highway and environmental standards (several tunnels were constructed at various points under the road for the critically endangered Florida Panther), signs along the toll road identifying it as SR 84 were removed, and I-75 signs went up to replace them in early 1993. While the SR 84 could have remained the hidden designation of the road, the Florida Department of Transportation decided to supersede it with the hidden designation already in place for I-75 south of Gillette: SR 93. This created the disconnection of SR 84 that exists to the present day. Major intersections References External links Florida Route Log (SR 84) 084 Interstate 75 084 084