The mechanical "helicopter" vehicles were showing signs of wear, and were removed before the 1994 reopening. The current installation by Viñoly features ramps and an elevated walkway which surround the "Panorama", allowing viewers to proceed at their own pace, or to linger for as long a look as they desire. Because of space restrictions, portions of the walkway are cantilevered over the outer edges of the map, but a glass floor still allows views of the model below. As in the original installation, tiny scale model airplanes take off and land at LaGuardia Airport, mechanically guided by long wires.