grade separation

grade separation
noun
a crossing that uses an underpass or overpass
• Hypernyms: ↑crossing, ↑crosswalk, ↑crossover

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noun
: a crossing of two highways or of a highway and pedestrian path or railroad utilizing an underpass or overpass

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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.
[1930-35, Amer.]

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grade separation noun (US)
A crossing at which one road, etc, is an underpass or an overpass
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Main Entry: ↑grade

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grade separation,
an intersection of highways, streets, or railroads on different levels, with ramps from one level to another, so that traffic going in one direction crosses over or under traffic going in a cross direction.

Useful english dictionary. 2012.

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