Gangways are temporary walkways used to load/unload passengers or cargo from on-road and off-road vehicles, ships, aircraft, and locomotives. These passages often have non-slip or rugged surfaces to maintain traction under many circumstances, and many are inclined or stepped to account for the level difference between the vehicle and boarding point. Gangways can also be used for intra-vehicle transit. Gangways with bellows are used on locomotive railcars, and gangways reflect a diverse array of components on ships.
Images credits: Wikimedia; Palm Beach Princess