What should you do when going through a contraflow system on a motorway?
What should you do when going through a contraflow system on a motorway? On approaching the system, you should get into the correct lane as directed by the road signs in plenty of time. You should stay in that lane throughout the contraflow. There may be temporary reduced speed limits in place which you should follow.
How far are you allowed to reserve?
You are allowed to reverse as far as necessary but no further. This is because what is necessary will vary on different roads. For example, on single-track lanes, you may need to reverse a long way to find a suitable passing point. You are also permitted to reverse in order to turn your vehicle around.