airport airport tarmac connected joined luggage luggage trolley rollers tarmac together trolley trolley train aid assistance bay bays cage carpark-trolley-bay carrier carry communication contain container direction load loaded location locator return shop shopping shopping-center shopping-centre shopping-trolley sign trolley-bay wheels mobile movement stairs transport travel vehicle abstract cart pattern repetition supermarket trolleys afternoon light shadows sunshine airport-tarmac baggage baggage-trolley loading luggage-trolley metal prepared preparing ready suitcases sunlight transportation waiting abandoned costly dumped left behind lost on its side shopping trolley theft animals caged cages care carers caring cats dogs pets