Box junction rules: what they are and how to use them

So, you want to know all about the rules at box junctions? You’ve come to the right place.

What is a box junction?

A box junction is a type of traffic-control measure consisting of a square or rectangular set of yellow lines, criss-crossed with further diagonal yellow lines. They are typically found at busy junctions such as crossroads or traffic lights and are designed to ease traffic flow by preventing people from stopping in areas where they might block other road users.

We’ll cover the basic rules on how to use a box junction, as well as what the penalties are if these rules are disobeyed.

How to use a box junction?

The Highway Code states that you must not enter a box junctions unless your exit path is clear. Or to put it another way, you are not allowed to stop in a box junction. The only exception to the rule is when you are turning right and are prevented from doing so by oncoming vehicles or other cars waiting to turn right as well.

If a box junction is located at a signalled roundabout, you may only enter the box if you are able to cross over it without stopping.

The aim in all cases is to keep the box junction clear so that you do not block traffic. Box junctions are also used in front of areas like fire stations, where an emergency may require a vehicle to exit or enter a building at short notice.

Will I be fined for breaking box junction rules?

If you are caught, yes. Many box junctions have cameras watching out for cars that break box junction rules by stopping on the diagonal yellow lines.

It’s quite an easy mistake to make in the hustle and bustle of a busy journey, especially in heavy traffic, so it’s important to pay attention in and around box junctions to avoid breaking the rules.

Fining drivers who break the rules at box junctions used to be the job of the police, except in London and Cardiff where the local authority was in charge. Since 2022 many other local authorities have been able to enforce ‘moving traffic offences’, including breaking the rules at box junctions.

If you’re caught stopped in a box junction, you face a fine. In London, the cost of breaking box junction rules on a red route is £160. Pay up within 14 days and that’s reduced to £80. In London boroughs the fine is £130, dropping to £65 if you pay within a fortnight.

In the rest of the country, the penalty is £70. If you pay within 21 days, it drops to £35.

So, if you want to avoid an annoying fine, don’t break box junction rules. But if you are caught, pay up promptly to halve the size of the fine.

Box junction FAQs

When may you enter a box junction?

You may only enter a box junction when the exit path ahead is clear, the only exception to this rule is if you are turning right and it is detailed below.

When may you wait in a box junction?

If you are turning right, then you may wait behind other vehicles that are also turning right or if oncoming traffic is temporarily blocking your exit path.

Can you turn right at a box junction?

Yes. Box junctions do not themselves preclude specific turns (though other road signs and rules may do so). You are allowed to enter a box junction if you intend to turn right and either oncoming traffic or other vehicles also wanting to turn right are blocking your way.

If this is at a junction with traffic lights, be sure to complete your right turn while the lights are still in your favour.

What if you get stuck in a box junction?

Sometimes you may find yourself getting stuck in a box junction despite your best intentions. If possible, try to move out of the way as soon as it is safe to do so.

Many motorists enter a box junction because they feel intimidated by other road users. It’s best to stay calm and obey the rules of the road – other drivers won’t pay your fine, will they?

How long can you stay in a junction box?

There’s no set time for how long you can be in a box junction, but you should move through it without stopping unless you are waiting to turn right.

So long as you enter the box junction when the far side is clear then you shouldn’t need to stay in it for more than a few seconds.

Do you get penalty points for stopping in a yellow box?

Break box junction rules and you face a fine rather than points on your licence. It could be anywhere between £160 and £35, depending on where in the country the junction is located and how quickly you pay.

The exception is if your actions lead to a collision. If that happens you may be charged with a more serious motoring offence, which could lead to points on your licence.

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