The Gwangam Tunnel (광암터널) is a road tunnel located on Hanam, Gyeonggi Province, South Korea. The tunnel constitutes the Seoul Ring Expressway.
The tunnel is constituted of 3 tunnels. 2 tunnels are to Pangyo Junction, and opened to traffic on 31 October 1991. At first, one is to Pangyo, and the other is to Guri. Each tunnels had 2 lanes. But, there was a road-widening project between Pangyo JC and Toegyewon Interchange, and the new tunnel, which has 4 lanes, opened on 10 December 2002. After opening the new tunnel, 2 tunnels, which has 2 lanes, is to Pangyo. And the new tunnel is to Guri.