Eliminate flat and and wide exit cubrs. Then install fifteen feet wide strips of well kept grass outlining the circuits, only then, after the grass, have either gravel or asfalt run offs.
Grass works fine. Think Vettel at Canada. When he ran wide the grass allowed him to retain enough controle to return without gaining time or making his mistake negligible. He ultimately paid for his mistake and that was a job well done by the run off in allowing a competitor to continue after a mistake without gaining any advantage.
Edited by Atreiu, 12 September 2019 - 14:23.