Jabarkan Terowongan Gibraltar dari Jalan Raya Trans Global

The Gibraltar Tunnel is proposed to be a rail tunnel linking Africa and Europe. Due to the depth of the Strait of Gibraltar (300–900 metres / 1000–2950 feet), it would be a great challenge to remove automobile exhaust from this depth. Any tunnel would most likely be an electrified rail tunnel, similar to the Channel Tunnel linking the UK and France. There have also been proposals for a bridge over the Strait.

Terowongan Australia-Papua Nugini dan Sambungan ke Indonesia

A tunnel/bridge between the Australian mainland and the island of New Guinea, bridging the Torres Strait, is not considered economically feasible owing to the great distance. Cape York in northern Queensland is 140 km away from New Guinea. This is a very long distance compared to existing tunnels or bridges, and the demand for car travel is not so high; as of 2009 there are no car ferries between Australia and Papua New Guinea. Passenger travel is by air only.

There might be more demand for connecting parts of Indonesia, most importantly the heavily populated island of Java, which could be connected to the Asian mainland by a crossing to Sumatra and from there across the Strait of Malacca to Singapore and/or Malaysia.