Soldato
I am generalising as I have not (recently?) driven that stretch of road, if ever. I do have a bus pass mouldering in my wallet, I also have about a million miles of driving under my belt since 1970.No random changes. All 60 nsl until you get to a village where they drop to 30.
If they, and you, find it too confusing then time to crack out that bus pass!
I object to your generalisations as you no doubt object to mine so we will continue our seperate ways at pace.