Patent ID: 7380507

Claim:
A transportation system comprising: a guide way defining a vertical axis, a pair of side surfaces, and first, second, third, and fourth surfaces, wherein the first and second surfaces are symmetrical about the vertical axis and are angled inwardly from respective ones of the side surfaces, and wherein the third and fourth surfaces are symmetrical about the vertical axis and are angled outwardly from the first and second surfaces, respectively; at least one track mounted on the first surface; at least one track mounted on the second surface; a vehicle having a composite center of gravity, the vehicle comprising: a cabin, at least one wheel rotatably mounted on the cabin; and at least one additional wheel mounted on the cabin; a first configuration in which: the vehicle moves along the guide way in a first direction; the at least one wheel engages a corresponding track on the first surface; the at least one additional wheel engages the third surface; and the composite center of gravity of the vehicle is laterally offset in a third direction from the track mounted on the first surface; and a second configuration in which; the vehicle moves along the guide way in a second direction, wherein the second direction is diametrically opposite the first direction; the at least one wheel engages a corresponding track on the second surface; the at least one additional wheel engages the fourth surface; and the composite center of gravity of the vehicle is laterally offset in a fourth direction from the track mounted on the second surface, wherein the fourth direction is diametrically opposite the third direction.