Make Half Life 2 Vehicles Admin Only?

I know how to make certain WEAPONS Admin-Only, but Half-Life 2 Vehicles are tricky. Does anyone know how to configure a Half-Life 2 Vehicle to be Admin-Only? I really need this! People have glitchclipping left and right all over my server!

/garrysmod/gamemodes/darkrp/gamemode/config
config.lua


-- adminvehicles - Whether or not vehicles should be admin only. 0 = everyone, 1 = admin or higher, 2 = superadmin or higher, 3 = rcon only
GM.Config.adminvehicles 				= 1

My server has it set to 1. Your choice.
IM assuming its darkrp. Not positive. My bad if im wrong.