Off-roadiness for Heavy Ground Vehicles

[FallingPhoenix]

Just noticed that under the Heavy Ground Vehicle chassis, there is an option for 'Off-roader' to give a vehicle the 'Off-roader' trait, then there is an option for 'Rough Terrain' that can give either the 'Off-Roader' trait or the 'ATV' trait.

I think the first one is unnecessary.