Trigger invisible barrier with trigger box

Hi

what I want is to force the player to go in a specific direction which in this case is forward and if anyone has a better idea to force the player to go forward and not another direction please let me know !!

(the image is of a spline path)

image

and this is how it looks from the ground, it’s open from all directions ( left, right, forward ) and of course the place the player came from

image

the idea of this whole thing is to make the player go forward take a turn then come from the right side then forward (from this image it’s left) toward the end