Selco Manufacturing

Overpasses

An overpass is a road, bridge, railway, or comparable structure that crosses over another road or railway. Overpasses allow for the unimpeded flow of vehicles, pedestrians, and wildlife by offering a safe passage method that separates movement.

​Uses For Overpasses

Overpasses are typically designed to improve the flow of vehicle traffic, pedestrian traffic, or the movement of wildlife.

Vehicle Traffic

Vehicle overpasses can take several forms, but the most common is a high-level overpass. This type of overpass allows vehicles to move uninterrupted over a highway or main overpass lane. Vehicle overpasses may also take the form of a bridge used to modify an existing at-grade intersection. Engineers refer to this modification as a grade separation.

Vehicle overpasses may also be a ramp added to an existing interchange, replacing a current cloverleaf loop, which can slow traffic and be challenging to construct. Depending on the overpass design, traffic may move at several distinct levels and flow in all directions at near open road speeds.