Question: what is the width of each line in standard track?
Answer: 400m standard track The Track comprises 2 semicircles, each with a radius of 36.50m, which are joined by two straights, each 84.39m in length. The Track has 8, 6 or occasionally 4 lanes but the last is not used for international running competition. All lanes have a width of 1.22m ± 0.01m.