Stone Mountain Freeway Gwinnett County and have a partial interchange with Park Place Boulevard and Rockbridge Road. Just to the east of this interchange, the freeway ends and US 78/SR 10 continue to the east, locally known as Stone Mountain Highway. West of I-285, the speed limit is . East of the interchange with I-285, the limit rises to . Unlike Georgia's Interstate highways, the highway still has actual sequential exit numbers, rather than being mileage-based. There is no exit 6, which makes the exit numbering non-sequential. All of Stone Mountain Freeway is included as part of the National Highway System, a system
Stone Mountain Freeway of roadways important to the nation's economy, defense, and mobility. Stone Mountain Freeway was under construction in 1967 along the same alignment as it travels today. By 1970, the highway was completed. The Stone Mountain Freeway shares state route number 10 with Freedom Parkway, a road in central Atlanta that connects with the Interstate Highway System at a major interchange on I-75/I-85 (the Downtown Connector). As that designation suggests, state officials originally intended the Stone Mountain Freeway to continue west, through Decatur, Druid Hills, and Candler Park, to downtown Atlanta. In pursuit of those plans, in 1969, the GDOT purchased