Thats down to the people that use it... no doubt there are other roads that are as bad, though I don't know of any that I use... could it be that its the raod used by many left hookers coming aways from the ports??
I think a lot of it is foreign lorry drivers. There is a wide and quiet road near me, that recently has become an illegal night stop for them, and in the morning it looks like a gypsy site.