Category:Proposed tunnels Subcategories This category has the following 6 subcategories, out of 6 total. Proposed tunnels by continent (8 C) Proposed tunnels by country (10 C)* Proposed toll tunnels (1 P) Proposed undersea tunnels (1 C, 1 P)R Proposed railway tunnels (1 C, 2 P) Proposed road tunnels (1 C, 1 P)
