Mikunidake Tunnel (三国岳トンネル)
The Mikunidake Tunnel is one of the tunnels of the Maizuru-Wakasa Expressway, running between Maizuru City, Kyoto Prefecture and Takahama-cho, Oi District, Fukui Prefecture.
As originally designed, this tunnel houses a two-lane roads without a dividing strip (it is temporary operated in two lanes out of four lanes of the road.)
2003: The tunnel began its operation when the Maizuru-Wakasa Expressway was extended to Obama and opened to traffic.
The proposal of construction was made for the Expressway and the tunnel for transforming the road into four-lane; however, currently there is no sign of starting the construction because the priority is given to complete the entire Maizuru-Wakasa Expressway first.