Dual carriageways are roads with two or more lanes of traffic travelling in each direction. The outer or right-hand lane in each direction is the lane nearest to the centre of the dual carriageway.
You must normally drive in the left-hand lane of a dual carriageway. You may use the outer lane of a two-lane or three-lane dual carriageway only:
Maximum Speed on a dual carriageways
National speed limits stands at 70mph with a central reservation otherwise it would be 60mph unless speed limit signs are in place
If another vehicle is already blocking the median space, wait on the minor road until there is enough space to clear the first half of the road without stopping on the carriageway. If the median is too narrow for your vehicle, wait on the minor road until you can clear both sides of the carriageway, or complete your turn in one go.
When driving a large vehicle, it is not safe to treat each half of the dual carriageway as a separate road. You should remain on the minor road until you can cross both sides of the dual carriageway without having to stop.
Always take care when you are behind large vehicles or vehicles towing trailers when they are turning. Remember, a long vehicle or combination needs extra room to finish a turn. Cyclists, motorcyclists and pedestrians, in particular, should be extra careful when near these vehicles.