ALL meanings of grade separation
grade sep·a·ra·tion
G g - noun grade separation separation of the levels at which roads, railroads, paths, etc., cross one another in order to prevent conflicting rows of traffic or the possibility of accidents. 1
- noun grade separation a point at which a railway and a road cross at different levels, one of them through an underpass or overpass 0
- noun grade separation a crossing with an overpass or underpass 0