Why do you say vehicles shouldn't use them? Do you mean drive faster on a dirt road than offroad?

I said vehicles shouldn't use them because those paths are supposed to be too narrow to be used by regular vehicles.

PLUS i meant vehicles shouldn't "accidentally" use them within their path-finding, so they don't end up getting stuck on such a path.

Basically i meant those tracks/paths to be some kind of different road-class, that only would be used by non-motorized units.

How would they be to narrow? Doesn't seem like something the devs would do preventing vehicle from driving across or down them. Nothing stops me from driving down a hiking trail in real life other than the police.

Hiking trails or foot paths is what i had in mind - and those are regularly pretty narrow, aren't they? Of course you - as a player - could try to drive along them, but did you ever try to drive down a hiking path with a 4-wheeled vehicle?

Give it a try:

http://www.publicdomainpictures.net/pictures/20000/nahled/hiking-path-1-238412973779541Zf.jpg

http://www.bouldercoloradohiking.com/wp-content/gallery/longcanyon/hiking-path-in-the-forest.jpg

http://www.hdwallpaperspics.com/uploads/2012/12/hiking-path-in-the-cloud-forest-monteverde-costa-rica+1152_12984701240-tpfil02aw-25452.jpg

Yea, I have done so with a quad before in real life, but in game if there are trees, just have some tracked vehicles in front of the convoy.

A quad is a regular vehicle for you? For me a quad is more a SUV-motorbike, but anyway, i think you do not want to understand in the first place.

foot-paths are not to be used by vehicles, because they supposable end up getting crashed or stuck at least