The term 'ROLLS DOWN A RUNWAY' can be summarized by the crossword solution TAXIS, which is a five-letter word. TAXIS are vehicles that are used to transport people from one place to another. They are usually driven by a professional driver and can be hailed on the street or called for in advance. TAXIS are also commonly seen at airports, where they can be used to transport passengers from the airport to their destination. In this case, the term 'ROLLS DOWN A RUNWAY' could refer to a taxi rolling down an airport runway, as it transports passengers to their destination.