abstract cart pattern repetition shopping supermarket trolley trolleys einkaufswagen frame grid grocery metal metal product metall queue shopping cart wagon wheels wire airport baggage car cars carts departure heavy luggage train station transport transportation travel vacation waggon weight carpark gray grey left-hand driving motor vehicles motor-cars parked red reflective shadows shopping centre shopping centre carpark stationary sunshine vehicles white care carpeting checking connected connections corridor doors entrance equipment exit guidelines hand-sanitizing healthcare healthcare-providers hospital hospital-ward instructions medical mobility notices nurses nursing nursing-station passageway post-operation pre-operation quiet room Rooms sanitation testing ward aerobridges air-industry airbridges aircraft airline airlines airport-tarmac airport-terminal angles appearance clouds cloudy connecting enclosed extending extends gates jet-bridge jets jetways joined ladders light lights moveable-bridges sky stairs tarmac terminal terminal-gates traveling travelling aeroplane airplane curved curves equipment-storage-area jet-engine lines luggage-trolley marked markings mobile plane prepared readiness ready service servicing steps cockpit movement rain raining wet crew luggage trolley