Lorries, Buses & Blind Spots

A lorry or bus can't see you the way a car can, can't turn the way a car can, and can't stop the way a car can — understand all three and you'll know exactly how much room to give one.

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⏱️ About 12 min

From behind the wheel of a car, a lorry or bus can look almost harmless — big, slow, and easy to predict. That impression is backwards. Large vehicles need far more space than a car in every direction: to see you, to turn, and to stop. Learn why, and sharing the road with them stops being a guessing game.

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The big idea: Large vehicles carry three physical disadvantages a car doesn't: much bigger blind spots, a wider turning path that can swing opposite the turn direction first, and a longer stopping distance because of their weight. Give them room in all three situations and most of the risk disappears.

🎯 By the end, you'll be able to

Identify the blind-spot zones around a lorry or bus, and why the nearside is the most dangerous one to linger in
Explain why a long vehicle may swing out the opposite way before a turn, and why you must never fill the gap that opens up
State why large vehicles need a longer stopping distance, and what that means for following and overtaking them
Recognise when to give way to a bus signalling to pull out from a stop

Why size changes everything

A lorry, coach or bus is heavier, longer and taller than a car, and its driver sits much higher up. Those differences don't just make it bigger — they change how it sees, turns and stops, and the rules you already know for sharing the road with a car don't transfer cleanly. Three things matter most: blind spots, wide turns, and stopping distance.

🔑 The blind spots are bigger than you think

A large vehicle has far bigger blind spots than a car, directly ahead, directly behind, and along both sides. The most dangerous zone is the nearside (the left side, in the UK) — it's wide, it runs the length of the vehicle, and it's exactly where cyclists and motorcyclists often filter or pull up alongside traffic. If you can't see the driver's face in one of their mirrors, assume they can't see you either.

Wide turns: why a lorry swings out first

A long vehicle's rear wheels follow a tighter path than its front wheels, so to complete a turn without the back of the trailer mounting the kerb or clipping a lamppost, the driver often has to swing out the opposite way first. In left-hand traffic, that means a lorry turning left may first swing out to the right — which looks, for a moment, like it's opening up a gap on its nearside.

That gap is not an invitation. The trailer is about to swing back across it to complete the turn, and there may not be room for you by the time it does.

⚠️ Never pull up on the inside of a long vehicle at a junction

This is one of the most serious risks in this lesson. If a lorry or bus is stopped or slowing at a junction, do not cycle, ride, or drive up on its nearside to get ahead of it — the driver may not see you there, and if it then turns left, you can end up caught between the vehicle and the kerb. If you're on a bike or motorbike, hang back and wait where the driver can see you.

Longer stopping distances — leave room, don't cut in

A fully loaded lorry, coach or bus is far heavier than a car and needs significantly more distance to stop at the same speed. That has two practical consequences: leave extra following distance when you're behind one, and never cut in sharply in front of a large vehicle right after overtaking it — a gap that would be comfortable in front of another car may not give the driver behind you enough room to react.

✨ Give way to a bus pulling out, if it's safe to do so

When a bus signals to pull away from a stop, let it out if you can do so safely — it's a small courtesy that keeps traffic moving and avoids forcing the bus to nose into a gap that isn't really there. You're not required to slam on the brakes for it; only give way when it doesn't put you at risk.

Check your understanding

1. Which blind spot around a lorry is generally the most dangerous to linger in?

The nearside blind spot runs the length of the vehicle and is exactly where cyclists and motorcyclists often filter or pull alongside — the driver may not see you there at all.

2. A lorry ahead signals to turn left but first swings out to the right. What should you do?

Long vehicles often swing out opposite the turn direction so the rear wheels clear the kerb. The gap that opens up is about to close again as the vehicle completes the turn.

3. Why do large vehicles need a longer stopping distance than a car at the same speed?

A loaded lorry, coach or bus is far heavier than a car, so it needs significantly more distance to come to a stop at the same speed — leave it extra following room.

4. A bus ahead signals to pull out from a stop. What's the right response?

Letting a bus pull out when it's safe to do so is standard courtesy on UK roads — you're not required to brake hard for it, only to give way when there's no risk in doing so.

✅ Key takeaways

Large vehicles have bigger blind spots than a car in every direction — the nearside is the most dangerous one to linger in.
A long vehicle may swing out the opposite way before a turn (right before turning left); never fill the gap that opens up.
Their much greater weight means a longer stopping distance — leave extra following room and don't cut in sharply after overtaking.
Give way to a bus signalling to pull out from a stop whenever it's safe to do so.

➡️ Lorries and buses need extra room because of their size. Next, two more road users that need special treatment for a different reason: trams that can't steer around you, and slow-moving vehicles marked by a flashing amber beacon.

Frequently asked questions

Why is the nearside (left side) blind spot on a lorry so dangerous?

It runs the length of the vehicle and is exactly where cyclists and motorcyclists often filter or pull up alongside traffic, yet it's one of the hardest areas for the driver to see. If you can't see the driver's mirrors, assume they can't see you.

Why do lorries sometimes swing the 'wrong' way before turning?

A long vehicle's rear wheels track a tighter path than its front wheels, so the driver may swing out the opposite way first to stop the trailer clipping the kerb. Never treat the gap that opens up as a space to filter into.

Do I have to give way to a bus pulling out from a stop?

You should let a bus out if it signals to pull away and you can do so safely — it's expected courtesy, though you're not required to brake hard or put yourself at risk to do it.

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Independent educational content — not affiliated with, endorsed by, or connected to the DVSA, DVLA, or any government body. This is study material, not legal advice; always confirm current rules in the official Highway Code.