Armoured vehicle-launched bridge

An armoured vehicle-launched bridge (AVLB), also known as a bridgelayer (especially for nonarmoured variants), or tank bridge, is a combat support vehicle, sometimes regarded as a subtype of military engineering vehicle, designed to assist militaries in rapidly deploying tanks and other armoured fighting vehicles across gap-type obstacles, such as rivers. The AVLB is usually a tracked vehicle converted from a tank chassis to carry a folding metal bridge instead of weapons.

Source: Wikipedia — Armoured vehicle-launched bridge (CC BY-SA 4.0)