Georgia Navigator

Georgia Navigator (sometimes also as Georgia NaviGAtor) is an Advanced Traffic Management System used in the U.S. state of Georgia. It is operated by the Georgia Department of Transportation (GDOT), and was first activated in April 1996, just before the 1996 Summer Olympics in Atlanta.

Most of the Georgia Navigator system is installed in metro Atlanta, where at least half of the state's population lives. It includes traffic cameras, changeable message signs, ramp meters, and a traffic speed sensor system. Unlike other ITS deployments around the world, Georgia Navigator almost exclusively uses video detection cameras to gather traffic flow data, as opposed to traditional sensors embedded in the pavement. Additionally, a portion of the system (Georgia 400 and parts of I-16, I-75 and I-85 outside of Atlanta) receives traffic flow information from floating car data gathered by anonymously tracking cell phones. All devices are connected by buried optical fiber, which in turn links to GDOT's command center at its Transportation Management Center (TMC) in Atlanta.

Outside of Atlanta, Georgia Navigator components were installed on Interstate 475 near Macon during its expansion from four lanes to six lanes. The Macon system is connected to the Atlanta TMC via fiber, allowing communication between the two centers. Georgia Navigator also has weather stations with pavement sensors mainly in the mountain and coastal areas of Georgia. Traffic sensors are installed on official evacuation routes, but are only activated during a hurricane approaching the Georgia coast or eastern Florida panhandle.

...
Wikipedia