what is the purpose of the "scratch line" painted on the track in the lane, for the 4x100 relay zone? is it to give the athlete a reference point on how far in the zone they are?
Didnt it used to be at the mid point of the old 20m zone?
Since the new zone is a full thirty meters, why isnt the scratch line at the 15m point within the zone? its past the halfway mark now (10m before the end).