## Overbridges - fly-overs and underpasses, Mechanical Engineering

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Overbridges, Fly-Overs And Underpasses:

Railway Over-bridges

Railway Over-bridges (ROB) are structures constructed to enable the road traffic to go over the railway tracks.

Fly-overs

Where one road crosses another road, and it is desired that they should not cross at the same level on the ground, a fly-over is constructed. One of the roads goes above the road it crosses, with sufficient clearance (about 5.0-5.5 m).

Underpasses

Underpasses are structures constructed to enable light vehicles, animals and pedestrians cross underneath a high speed facility. A clearance of 2.5-3.5 m is provided.

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