grade separation

Grade separation is the process of aligning a junction of two or more transport axes at different heights (grades) so they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be all alike; instead, it can consist of a mixture of roads, railways, and canals. The construction of bridges, tunnels, or a combination of both can be built at a junction to achieve the needed grade separation.
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Noun
1. a crossing that uses an underpass or overpass
(hypernym) crossing, crosswalk, crossover

Eng: grade separation
Urdu: اُوپَر نیچے سڑک ۔ زیریں راستہ ۔ بالائی راستہ ۔ ریلوے کراسِنگ میں آمدورفت میں رُکاوٹ یا حادثات سے بَچنے کے لیے بنایا گیا زیریں یا بالائی راستہ ۔