so is there a legal defintion of a “phyical barrier” i mean cones are a barriers or a line of sauages even, they wont stop you going through but its a barrier 
Your on a dual carriageway and you enter some roadworks, a contraflow system is in operaton and the marked limit is 50mph through the road works.
what is the maximum legal speed you can do in your truck through the roadworks/contraflow?
Cruise Control:
Your on a dual carriageway and you enter some roadworks, a contraflow system is in operaton and the marked limit is 50mph through the road works.what is the maximum legal speed you can do in your truck through the roadworks/contraflow?
To summarise:
The info in the above link suggests, regarding contraflows on DCs, that “from Chief Superintendent Police Liaison Officer Jeremy Moore” “once a dual carriageway, always one!” . i.e. national speed limits still apply (unless otherwise specified). However, the thread also suggests, until proven in a court of law, to take that with a pinch of salt, although it seems unlikely for someone to be done for exceeding the DC NSL in such circumstances.
Also in that thread the legal definition of DC contains “… consists of a central reservation to separate a
carriageway to be used…” and the final post shows a photo with a mere strip of grass and a sign showing “dual carriageway”. A narrow strip of pavement is also used e.g. A4 Portway, Bristol.
