Walkthrough Signs Dangerous (Forza Horizon 5)

Hello everyone, the fact is that when completing all the tasks of the signs, it is dangerous to have such tasks of the type
Example: while driving the supra, it is dangerous to overcome at least 15 meters near the sign (event horizon) without touching the ground.
And the actual solution I can't find and just jumped through the sign and jumped next to the sign does not count, I do not know what to do, tell me good people!