How to know if I stop colliding?

I'm doing a car game, what I want to do is that when I hit the wall it slows down, but when I return to the track I continue with the normal speed.

Simplified: I want to detect when a collision object with another and when it stops colliding

Thank you very much!

you can control car speed with acceleration

Marcos12 , use "Car Is overlapping Wall" condition to slow the car down.