Auxiliary Interstate Highway in Chatham County, Georgia, United States
Interstate 516 (I-516, also known as the W.F. Lynes Parkway) is a 6.49-mile-long (10.44 km) auxiliary Interstate Highway mostly in the coastal city of Savannah, located in the east-central portion of the U.S. state of Georgia. It is the only auxiliary route of I-16. For its entire length, I-516 is concurrent with State Route 21 (SR 21), which I-516 superseded in 1985. It was formerly also signed as State Route 26 Loop (SR 26 Loop).[4][5] The highway also carries unsigned State Route 421 (SR 421) to ensure that all Interstates in Georgia had 400-series reference numbers.[6][7]