So I don't know if anyone else knew this or not since I'm not very observant, but you can use vehicle pads in slayer game types. Obviously this is used so that enemy teams can't take the other teams vehicles or destroy them. I'm sure there is many more way to expand on this but I dout I'm smart enough to discover them. So let me know if you have any more ways to do this or any other nifty ideas.
You can reduce the radius of the pad to 0, so it can't be activated, and you have a cool little hologram of the vehicle. Having trouble figuring out how to get the holograms to appear right at the start though. Takes about 90 seconds in game.