When a bus turns a corner, it must swing out so that its rear wheels don't go into the cycle lane. In this picture, as the bus goes round the corner, the front wheel is on the edge of the cycle lane, but the rear wheel cuts into the cycle lane. The diagram below shows the geometry of this situation. The diagram below shows the geometry of this situation. Bus Sidewalk ,' outside edge " of cycle lane. 0" The distance between the front and rear wheel is called the wheelbase, w. Let r represent the radius of the outside edge of the cycle lane. The distance marked x shows the amount by which the rear wheels cuts into the cycle lane. Know that x2 2xr + w2 = O. 1. Let w = 10 feet and r = 17 feet. (a) Figure out how much the rear wheel cuts into the cycle lane. (b) Figure out how far the front wheel must be from the outside edge of the cycle lane for the rear wheel not to cut into the cycle lane