On local roads, Navigator includes cameras and signs that are operated by local county and city governments, though coverage is not nearly as dense as the freeway portion of the system. Unlike early systems which used induction loops, the new meters will employ video detection cameras to sense the density of traffic and allow an optimized rate of vehicles to proceed onto the freeway. Some of the first corridors to be metered were I-285, I-85 in Gwinnett County, I-75 in Cobb County, and I-575. Several ramp meters began operation in 20 in metro Atlanta. By late 2009, nearly all freeways in metro Atlanta will have full Navigator coverage. Other expansion projects underway include US 78, GA 400 inside I-285, and I-85 in the Union City / Peachtree City area. As of May 2009, work on I-285 is nearing completion on the south side from I-85 east to I-75. It also covers the freeway portions of Peachtree Industrial Boulevard (SR 141) and Langford Parkway (SR 166), as well as Georgia 400 from I-285 to the Alpharetta area. The system covers nearly all of the Perimeter ( Interstate 285) highway around Atlanta, and all Interstates within and several miles beyond it. Georgia Navigator is in the midst of a large expansion program. An example of a third-party use of Navigator data is The Weather Channel, which shows current traffic conditions (provided by Traffic Pulse) during the local forecast portion of its broadcast. Additionally, Navigator data is used by several other companies, who typically enhance and package the data for sale to various media outlets or private websites. GDOT administers two of its own websites (a standard version and a customizable "My Navigator" version), and operates a 511 telephone information service. Information from the system is distributed to the public through a variety of outlets. Traffic sensors are installed on official evacuation routes, but are only activated during a hurricane approaching the Georgia coast or eastern Florida panhandle. Georgia Navigator also has weather stations with pavement sensors mainly in the mountain and coastal areas of Georgia. The Macon system is connected to the Atlanta TMC via fiber, allowing communication between the two centers. Outside of Atlanta, Georgia Navigator components were installed on Interstate 475 near Macon during its expansion from four lanes to six lanes. 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. 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. 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. It includes traffic cameras, changeable message signs, ramp meters, and a traffic speed sensor system. Most of the Georgia Navigator system is installed in metro Atlanta, where at least half of the state's population lives. 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. Georgia Navigator (sometimes also as Georgia NaviGAtor) is an Advanced Traffic Management System used in the U.S.
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