Who decides ??

[delboy735]

So, in light of my son receiving yet another ticket for speeding...69mph on a dual carriageway !! ( transit connect ),I have a question. Who, or what govern..mental.. department decides on the classification of road ?
I mean, who decides "dual carriageway" or "motorway"?
Also, who, or again which governmental body decided that a van smaller than most chelsea tractors should be designated a LGV ?
I know that all PH readers know the speed "limits" of all vehicles, but who is ( or are) the deciders of these things ?
For the record my son got a bit annoyed, then just shrugged his shoulders and got on with the rest of his day....this is just me asking the question.

[delboy735]

xRIEx said:

delboy735 said:

I mean, who decides "dual carriageway" or "motorway"?

I can't answer as to who decides, but it's fairly obvious which is which: blue signs relate to motorways, and they will have a sign indicating when the motorway starts and another when it ends; green signs relate to major (usually A) roads. It's a dual carriageway if it has green signs and a physical barrier in between the carriageways (central reservation).

I am aware of that, the question was really with regards to some roads that start as "A roads....dual carriageway" then change to "Motorway", and then revert back...ie A74/M74.....A1/A1M.
Did the planners have a brain fart and think...sod it, we'll split it to confuse every bugger.
Anyway, "vans.....specifically small vans" why 60 on a dual carriageway, then 70 on a Motorway and then 50 on a main road non-dual ?? What does it achieve besides money in the gov coffers ??
do they really become less dangerous the faster they get on a big road ??