Yellow box junctions are placed at busy junctions to aid the flow of traffic through the junction. They can also be placed to keep a road space free to ensure emergency services have a clear exit from fire stations and hospitals.
Recognising a box junction
Yellow box junctions are indicated by yellow crisscross lines painted on the carriageway:
They can be found at road junctions and at some roundabouts and there are no requirements for yellow box junctions to be accompanied by signs or a Traffic Regulation Order.
Using a box junction
The rules of box junctions can be found in the Highway Code (174)
You may enter a yellow box junction when your exit is clear and there is enough space on the other side of the junction for your vehicle to clear the box completely without stopping. You can stop in a yellow box junction when turning right if you are prevented from turning by oncoming traffic, or by other vehicles waiting to turn right.
We issue PCNs for a failure to comply with the rules of box junctions.
- Check your exit is clear. If you simply follow the vehicle in front of you without doing so it may stop and prevent you from fully crossing the junction.
- Just because a traffic light is green this does not mean the rules of box junctions do not apply.
- Don't let other drivers pressure you into entering the box when a clear exit is not available
Banned Turns
Certain manoeuvres (turns) are banned on some of our roads. Ignoring these bans can be very dangerous and could result in an accident.
A banned turn occurs when drivers ignore signs giving instructions as to a direction they must or must not take. Enforcement of banned turns helps to manage how traffic uses the road and makes it safer for pedestrians and other drivers.
Recognising a banned turn sign
These signs are listed in the Highway Code, which you may wish to consult. They are either signs with:
- A white arrow on a blue background showing you the direction you must take, or
- A red outer circle with a red line showing you the direction you must not take
What you MUST do | Traffic Sign |
Straight ahead only: You must continue ahead only. You must not turn left, right or make a U turn. | |
Left turn only: You must turn left at the junction ahead. You must not turn right, go straight ahead or make a U turn. | |
Right turn only: You must turn right at the junction ahead. You must not turn left, go straight ahead or make a U turn. | |
Turn left: You must turn left. You must not turn right, go straight ahead or make a U turn. | |
Right turn: You must turn right. You must not turn left, go straight ahead or make a U turn. |
What you must NOT do | Traffic Sign |
Make a right hand turn | |
Make a left hand turn | |
Make a U-turn |