A vertical-lift bridge or just lift bridge is a type of movable bridge in which a span rises vertically while remaining parallel with the deck. Generally speaking, they cost less to. Movable bridges are designed and constructed to change its position and occasionally its shapes to permit the passage of vessels and boats in the waterway. This type of bridge is generally cost effective since the utilization of long approaches and high piers are not required. It may be single- or double-leafed. These structures are built where low-level crossings are necessary, but where high-mast vessels require temporary, substantial vertical clearance. Till now no bridge such has been built in India. Experimental systems can measure the.
