We have some doubt how are the right approach usually used to measure the race where we have a bi-directional road (runners will run this road in both directions).
The width of the road is often between 3 and 4 meters.
Solution 1:
The measure line (red) is equal for both direction, this assume that the runner can use always the shortest way.
Solution 2:
The measure lines are distinguish for the 2 race direction, and are parallel to the road's border.
No physical separation between the directions during the race.
Solution 3:
The measure lines are distinguish for the 2 race direction, and are parallel to the road's border.
Physical separation between the directions during the race (with obstacles like cones, etc.)
Complex to realize and also, due the limited width, the space for the runners are drastically reduced to the half of the road.
We will appreciate comments and suggestion to this topic.
