Truck lids secure and protect a cart or tilt truck's load. They have a dome design that maximizes the truck's storage capacity. They may also have a center hinge that allows the lid to open from either side, which provides easier access to the truck's contents. Truck lids come in a variety of sizes to accommodate specific carts and tilt trucks. They can be used on medium-duty, heavy-duty and super heavy-duty tilt trucks.