Wrong-way driving (WWD) is an immediate, urgent hazard on any roadway, whenever and wherever it occurs. That’s why it was a significant development when the Central Florida Expressway Authority (CFX) became the first agency to pilot Rapid Rectangular Flashing Beacons (RRFBs) as a WWD countermeasure. CFX initially set out to develop a better understanding of issues related to wrongway driving, as a first step in deploying systems to minimize or mitigate the problem. Its research focused on equipping Wrong-Way signs with RRFBs, radar or laser detection, and cameras to detect, deter and prevent wrong-way drivers from using exit ramps to enter the toll road mainline. Its evaluation of RRFBs involved testing on five ramps along the roadway network, one on State Road 528 and four on State Road 408.