On a track with a curb the official length of the track is measured 30cm from the inside edge of lane 1. If the length of the track 30cm from the inside edge is 400 meters, it means the length along the inside edge is 398.12 meters.
Are all tracks built assuming there will be a curb, and therefore are made to be 398.12 meters along the inside edge? Or are there some tracks that are assumed will never have a curb, and are therefore made to be 398.74 meters along the inside edge (20cm offset)?
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