Kan-Etsu Tunnel

The Kan-Etsu Tunnel (関越トンネル, Kan'etsu Tonneru) is a tunnel on the Kan-Etsu Expressway in Japan that runs through Mt. Tanigawa from Minakami, Gunma to Yuzawa, Niigata. The northern tube was opened in 1985 and the southern tube was opened in 1991.^[1] The older one is used as a tunnel towards Niigata and the newer is towards Gunma.

Kan-Etsu Tunnel
関越トンネル

Nagaoka-bound tunnel entrance at the Yuzawa side
Overview
Location	Gunma and Niigata prefectures
Route	Kan-Etsu Expressway
Start	Minakami, Gunma (36.7802°N 138.9389°E / 36.7802; 138.9389)
End	Yuzawa, Niigata (36.8657°N 138.8759°E / 36.8657; 138.8759)
Technical
Length	10.926 kilometres (6.789 mi) (Tokyo-bound) 11.055 kilometres (6.869 mi) (Nagaoka-bound)

Prefectural border in the tunnel

Data