crossrail

noun2

1. •
   A rail that goes across something.

   • The stroke of the planer is remarkably uniform, the reverse taking place at the same the same screws which carry the crossrail. — 1905
2. •
   (UK) A commuter rail line that crosses a major city through a tunnel and which continues for a significant distance into the surrounding areas, generally with relatively high speeds and widely spaced stations compared to an underground or metro.

   • A crossrail link to Aberdeen and Stonehaven is planned. — 2004