Hey there @Dahun_Song! If that track isn’t specially generated as a spline with some wizardry, then you should be able to generate collisions for it in the static mesh itself. So the first question if if the static mesh has collisions already and are just not colliding with your car. If there’s no collisions, follow the steps below to make some. If there are collisions, we’re going to have to go to check and see if it’s currently blocking all or specifics.
But be warned, it’s only convex generation so if you have other pieces that are whacky shaped the generation may not go well. For the piece you have in front of you however? Give it a shot and let me know.
Let me know if you have any questions!