They have evolved from a one-room building with little to offer in the way of passenger amenities, to massive multi-level facilities that allow to access the terminal and provide vital services to passengers. The design of an airport takes into account the needs depending on the mode of transport used by passengers to and from the airport. As passengers make their way to the boarding gate, airports are looking for more efficient ways to ensure their bags get to the plane. Even though Denver's baggage system failed, it shows how the future of baggage transportation is developing. As airport terminals grew in size, airports developed ways to reduce the distance passengers travel by installing moving walkways or a tram system. It is clear that the modern airport should have no problem keeping up with the increase in passengers and moving them efficiently