Anti-trespass panels
Anti-trespass panels (ATPs) are a type of hostile architecture used by railroads to improve safety by reducing pedestrian accidents. They consist of materials such as wood or rubber arranged in such a way that they are difficult to walk on stably, and are placed adjacent to pedestrian crossings or stations, where there is a possibility that people might trespass on the railroad's right-of-way and be struck and killed or seriously injured by passing trains.