SFB – I think its called Great Tower!
You went past a sign that said "no through road" and were surprised when you came to a dead end.
How do you manage with other daily tasks, i.e. eating, walking, using the toilet? FFS.
Obviously, I was not completely surprised when I came to a dead end but it could be implying that normal 2 wheel drive cars may not be able to continue where a 4×4 would be okay.