martine wrote:Looks to me as if the edge of the road is breaking up...subsidence?
clicky
It is quite common for the edge of a rural road to go first. Heavy vehicles sometimes have to put 2 wheels on the verge when they meet each other and this starts to break up the unsealed edge of the road - the ruts that form on the verge hold standing water that then percolates under the wear course allowing frost to rip it apart.
In this case though I suspect the culprit is tractors swinging out before turning into that gate on the right.
As for the restriction I can only presume it is an attempt to deter through HGV traffic, though why they did not apply it to the whole length is odd - I wonder if the council official had not fully grasped the meaning of "except for access"