Lane - The ordinal number of the lane with the first lane being on the inside Total length - The total length of the lane Radius - The radius of the curve 0.30m from the inner side into that lane Semi-circle length - The length of the half circle of track at that radius Delta - The length a track of this radius is longer than the inside track (and thus how much lead-in is needed to make it a fair race) Angle - The corresponding staggering angle (Starting at this offset ensures that a racer in that lane runs the same distance on a curve.)[3][4]