This is a prefab for hybrid cp/payload maps, as used in @tyler 's Fountain. It plays like an Overwatch hybrid map: Capture the first point, and then push the payload to its destination. To fit with TF2's theme and HUD, the cart is on an elevator that raises up as the first point is capped.
Thank you for this I tried to do this myself a few months back and I got it kinda working but it was messy as hell. Definitely gonna use this in a future map