You don't have to drill tunnels. The North Shore line isn't on tunnels for the most part, but it also never goes anywhere near the shore. I guess it's true th

You don't have to drill tunnels. The North Shore line isn't on tunnels for the most part, but it also never goes anywhere near the shore. I guess it's true that now you might need tunnels (especially for the eastern suburbs). But these lines could have been built many decades ago.