See map at https://www.waze.com/editor/?lon=19.24039&lat=-34.28343&zoom=6&layers=TBFTTFTTTTFTTTTTTTTTTTTTTT&segments=207409385&env=row. The whole horseshoe below the road I just added is a private road with a closed gate and a sign saying Trespassers will be Prosecuted. The segment I added is passable but probably only for a 4x4 or high ground clearance vehicle. It is level 4 so I can’t edit it. SJWatson was original creator of the road.
I have changed the lock to level 2, which I think is high enough for such a road, so if you want to join the new road you added to the other road, you can. I suggest that you change the ‘horseshoe’ section to Private Road. The fact that it will no longer show as Dirt Road is less important than preventing waze from trying to route thru there.
I’m glad you warned about the ground clearance, I was planning to drive that route sometime in the future, but I don’t think my Hyundai i10 will cope :o