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
Cumberland Mountain State Park River) near Crab Orchard. Cumberland Mountain State Park forms a semicircle around Byrd Creek and Threemile Creek, with Byrd Lake being the eastern or "closed" half of the circle. The park's main entrance is located along Tennessee State Route 419 (Pigeon Ridge Road) just west of Homestead. U.S. Route 127, which intersects TN-419 at Homestead, connects the area with Crossville and Interstate 40 to the north and the Sequatchie Valley to the south. Tennessee State Route 68, which also intersects US-127 at Homestead, connects the area to Spring City in the Tennessee Valley to the east. In 1933, at the