I was not aware of this ... while Oz is further advanced in rail than America, its still only just now getting out from under a "protect what we have" attitude into an attitude of modern systems being used to servce additional transport tasks. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
(low mountains) have sections alongsaide highways, new Italian lines too, especially Milan-Bologna (opens soon) and Turin-Milan (half opened):
...some sections of all TGV lines:
...and the Channel Tunnel Rail Link.
*Lunatic*, n. One whose delusions are out of fashion.