The approach rules for turning right onto a dual carriageway are the same as those described for normal junctions. Once you reach the emerging point things get a little more complicated; you now have to cross the central reserve.
You must give way to the right before moving out of the side road; and then give way to the left before emerging onto the other side of the carriageway. If necessary you must stop and wait once you reach the middle. Unless road markings show otherwise, you must always keep to the left-hand side of the gap in the reservation. There may or may not be give way markings painted in the centre.
Although you initially need to give way to the right; it’s still very important to look directly ahead and to your left before going forward. Any traffic coming from your left may be crossing your path as you enter the central reserve; and you need to make sure that you don’t block their path. Looking properly to the left as you move out also means that you can avoid stopping to look in the centre. If it’s safe you can complete the turn in one movement.
Traffic coming off the major road has priority over you. In the image, the driver of the car coming into the gap from the left may be turning into the side road or carrying out a u-turn. If you’re not sure then you must wait for them to clear the junction before you move out.
Sometimes you may find that there is no gap opposite the end of your approach road. In this situation you need to emerge into the right hand lane and then take the next available gap to do a u-turn. Delay your right turn signal here until just after emerging to avoid causing any confusion.
You may find a compulsory turn left sign at the end where there’s no immediate access to a gap.