HH - correct and they have trapped a lot of unwary 4x4 drivers.
The problem is exacerbated by the surface and the relatively scarce traffic - people tend to drive in the middle which pushes the loose stuff towards the edge (think marbles on an F1 track) so when deviating from the middle of the road for oncoming traffic, the surface tends to 'snatch' at the big 4x4 tyres which would be OK if there wasn't a 4 foot drop!!!