Outer Perimeter

State Route 500 marker
State Route 500
Outer Perimeter Highway
Northern Arc
Route information
Maintained by GDOT
Length55 mi[citation needed] (89 km)
Historyproposed
Major junctions
West end I-75 near Cartersville
Major intersections
East end I-85 / SR 20 in Buford
Location
CountryUnited States
StateGeorgia
Highway system
  • Georgia State Highway System
US 441 SR 515

The Outer Perimeter is a freeway originally planned to encircle Atlanta, in the U.S. state of Georgia about 20 to 25 miles (32 to 40 km) outside of Interstate 285, which is colloquially referred to as the Perimeter and is a point of reference for local travel outside Atlanta's city core.