(Treat ALL Junctions as Box Junctions!)


Box junctions are normally used on large busy junctions such as traffic light controlled crossroads, T-Junctions and even roundabouts. These have criss-cross yellow lines painted on the road. The rules for box junctions apply to all junctions!


The examiner on your driving test will expect you to: -


  1. Use the MSM routine in good time
  2. Not to enter a box junction unless your exit road is clear
  3. Slow down and stop before the box junction if your exit road is not clear
  4. Control your speed on approach to box junctions.
  5. Move off, after looking carefully to ensure it is safe.


How to use a Box Junction


Box junctions make it possible to keep the flow of traffic moving and therefore keep the junction clear, by preventing traffic from stopping in the path of crossing traffic.
Use the mirror-signal-position-speed (Gear)-look (LADA) - {MSPSL} early and this will give you time to assess the junction before you get there. 


You should only enter a box junction if you can clear the junction without stopping.


 There is one exception to this rule; if you wish to turn right and your path is blocked by oncoming traffic, you may enter the junction. It is OK for you to wait on the yellow criss-cross providing your exit road is clear.


When the way is clear move away smartly and do not cause an obstruction.
Be careful when queuing inside the box junction as you may not have time to clear the junction before traffic lights change.


When you should not enter the box junction


You MUST NOT enter the box until your exit road or lane is clear.
IF there is a line of traffic already in the road on the right and there is no room for you to join this queue without blocking the flow of traffic you should not enter the box.