What is the national speed limit on a dual carriageway for cars and motorcycles?
A dual carriageway, showing national speed limit signs the black and white ones, its 70 unless towing, then its 60. A single carriageway showing national speed limit signs is 60 unless towing, then its 50. Many dual and single carriageways will display speed limit signs, a dual carriageway near me has 30MPH signs. These have to be displayed as you enter the 30MPH area from a different area and every 200 yards I think.
