Know the zones

HGVs have zones of
limited visibility

Don't linger next to an HGV

Find out how »

Know the

Large vehicles, such as heavy goods vehicles (HGVs) have zones of limited visibility and are considerably longer, heavier, and more powerful than standard vehicles. They also need more stopping distance.

Other drivers often underestimate the size and position of these zones of limited visibility. Please be aware of the zones so you can stay safe.

Three points to

There are three simple ways you can improve your safety when driving around HGVs and other large vehicles.

Stay visible

HGVs have areas of limited visibility along both sides. Don’t linger in these zones. Overtaking large vehicles is more difficult, so make sure that you have enough room ahead to complete your overtaking manoeuvre.

Overtake with care 

Ensure that you have enough space ahead to complete your overtake before committing to the manoeuvre. Remember it takes more time to pass a large vehicle. Don’t pull back in too quickly. Make sure there is enough room between you and the HGV's front blind spot

Don’t tailgate

HGVs have longer blind spots at the back. Dropping back will make it easier for you to see ahead and it should allow the driver of the large vehicle to see you in their mirrors. Getting too close behind large vehicles will mean you can’t see the road ahead. It will also reduce your stopping distance.

HGVs have limited
visibility zones

HGVs have zones all around them, where their vision is limited, so don’t linger around an HGV. If you are behind an HGV, stay well back so you can see the road ahead.

Know the zones

The image shows where you can find the zones of limited visibility around an HGV. See if you know where the zones are. There are four zones. Explore the image to find them.

Know the zones an interactive image showing here the zones of limited visibility are >

If you find yourself in a

limited visibility zone

Avoid lingering in these zones and move through them safely

Front zone

HGV drivers sit high up. If you are too close, they won’t be able to see you. When driving in front of an HGV ensure there is enough space between you and the HGV to allow them to see you and have enough room to brake safely.

Left zone

The Highway Code advises not to undertake other vehicles. Do not overtake on the left or move to a lane on your left to overtake. However, if you do find yourself in the left lane with an HGV on your right, you should manoeuvre yourself out of the limited visibility zone safely, as the driver might not have seen you.

Right zone

Overtake with care. Make sure that you have enough room ahead to complete your overtaking manoeuvre. It takes longer to pass a long vehicle so do not linger and ensure there is enough room to pull back in to where the driver can see you.

Rear zone

If you are driving too close when following an HGV, you will not be visible to the driver or be able to see the road ahead. As a rule, if you are not able to see the HGV’s external mirrors or cameras, the driver cannot see you. Make yourself more visible by pulling back to where you can be seen. This could be up to three car lengths.

See it from the HGV driver

Car and van drivers don’t always realise the challenges faced by an HGV driver. Seeing things from their perspective may help you to understand why you need to drive safely around them.

It’s a
complicated job

HGVs are complex machines and demanding to drive. Since 2007 double mirrors have been mandatory on all new lorries to reduce blind spots. However, the environment both inside and outside of the HGV cab can limit the driver’s visibility and responsiveness.

illustrating how HGV cab can limit the driver’s visibility

HGV wheels breaking


HGVs are far longer and heavier than other vehicles on our roads. This means that their braking distances are a lot longer than those of cars and light commercial vehicles. Give an HGV plenty of space when you overtake.

Safety is good for

HGV drivers are specially trained to drive in different road environments and anticipate risks. However, it’s every road user's responsibility to look out for each other on the road. Please remember that your decisions directly impact other road users.

child waving at the HGV drver

Three points to remember for
HGV drivers

Be predictable

Make your intentions clear and visible so other drivers understand what you’re going to do.

Be prepared

Be prepared to cancel your manoeuvre if it might present a risk to other drivers.

Look and look again

Assume there might be a vehicle in the lane beside you. Before you manoeuvre look and look again.

Car in the limited visability zone

When in doubt,
slow down

When it comes to keeping safe, slowing down can make all the difference. Always slow down in response to changes in road conditions, including severe weather, heavy traffic, or poor visibility of the road ahead. This gives you, and the car and van drivers around your HGV, extra time to take corrective action or respond to sudden changes on the road ahead.

HGVs have zones around them where their visibility is limited. You might not even know you're in one.

Driving around large vehicles and HGVs

For more information about driving around HGVs, visit our safety advice page

Learn more about staying safe around HGVs