grade separation

1. 1.

   a crossing that uses an underpass or overpass

   Broadercrossing

Questions about grade separation

What does grade separation mean?

grade separation means "a crossing that uses an underpass or overpass".

Is grade separation a common word?

grade separation is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.