Learn to drive safely on all types of dual carriageway. To do this you need to be confident when using urban and rural dual carriageways and clearways Joining a dual carriageway - if there’s a slip road, use it to adjust your speed to match any vehicles on the dual carriageway and join where there is a suitable space. If there is no slip road, join as you would on any other road traveling on a dual carriageway - choose the correct lane. When leaving, you should move into the correct lane in good time turning right off a dual carriageway where allowed