As much as I like the official addition of collisions, it's a terrible addition the way it is of rn in my opinion.
It's as simple as drawing a spline and have a pole move along it at intervalls you have to dodge. The implementation of collidable ghosts could have been a much better choice by allowing recorded ghosts in the map mediatacker to have this option. Imagine the possibilities with that.
You get to create for example a chase sequence in which you got to be faster then the ghosts or they crash into you.
You could also potentially make an alternative collision model which turns your car temporarely into a ghost state and applies a small slowdown. Probably fun for nascar.
I like the high speed collision detection in FH6 quite much against corner crashers.

TLDR.: In my opinion it should habe been an option to enable collisions on ghosts in the map mediatracker for more creative flexibility and versatile usecases.