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# When to signal, and when not to

Signal when it would help another road user understand your intended change of direction, position or speed. Do not signal automatically if there is nobody to benefit, or if the signal could mislead someone into danger.

Written by the Fast Track instructor team · Reviewed by a DVSA approved driving instructor (ADI) · Updated August 2026 · 7 min read

1.  [Home](/)
2.  / [Learner Hub](/learn)
3.  / [Rules of the road](/learn/rules-of-the-road)
4.  / When to signal, and when not to 

## The short version

-   A signal is information, not a request for priority. 
-   Check mirrors before you signal, not after. 
-   Signal in good time, but not so early that it becomes misleading. 
-   Do not give a signal just because a routine says so. 
-   On test, a misleading signal can be worse than no signal. 

## Quick answer: when to signal, and when not to

As a learner driver in the UK, the simplest rule is this: signal when another road user could benefit from knowing what you intend to do. That includes drivers, cyclists, motorcyclists, horse riders and pedestrians. If your intended movement could affect them, your signal helps them plan. If there is nobody to help, or the signal could confuse someone, you may not need one.

You normally signal before turning left or right, changing lanes, pulling up, moving off, overtaking, leaving a roundabout, or changing position significantly on the road. You should not signal automatically without looking first. A common test fault I see is the learner flicking the indicator on before checking mirrors, then discovering a cyclist or car is already alongside. By then the signal has become a surprise rather than useful information.

You should also avoid signals that suggest something you are not actually going to do. For example, signalling left too early before a side road can make a waiting driver think you are turning into that road. Signalling right on approach to a parked car when there is no one to inform may be unnecessary, but signalling right when a following vehicle is about to overtake can be very useful. The decision depends on what is around you.

This article is general guidance for learner and new drivers, not legal advice. For the legal baseline, read The Highway Code, especially Rules 103 to 106 on signals and general warning signals. The Code is updated from time to time, so always check the current version on GOV.UK.

[![Side road ahead on the left — official UK road sign](/signs/side-road-left.svg "Side road ahead on the left")Side road ahead on the left What it means ](/theory/road-signs/side-road-left)

Official UK sign artwork — tap a sign for the full explanation and test questions.

## What the Highway Code expects

The Highway Code says you should give clear signals in plenty of time, having checked that it is not misleading to signal at that time. Rule 103 is the key one for learners: signals warn and inform other road users, including pedestrians, of your intended actions. Rule 104 reminds you to watch out for signals given by other road users and proceed only when you are satisfied it is safe.

Rule 106 is also important because it deals with signals to other road users. For example, flashing headlights only lets others know you are there. It does not mean you are giving way or inviting someone to go. In lessons, I still see learners wave pedestrians across the road, flash another driver out of a side road, or use the horn as a thank you. Those habits create confusion and can be marked as poor judgement.

On the practical driving test, the examiner is not looking for robotic signalling. They are looking for safe, timely, useful communication. A missing signal can be a driving fault if someone might have benefited from it. It can become serious if another road user has to react, is misled, or the situation becomes unsafe. An unnecessary signal can also be marked if it confuses others.

The important point is that signals are part of observation and planning. The examiner can see whether you looked, whether you understood who was around you, and whether your signal helped. A perfectly timed signal tells the examiner you are reading the road, not just operating a switch.

## Use the right routine: mirrors, signal, manoeuvre

Most learners are taught mirror, signal, manoeuvre, often shortened to MSM. It is a good foundation, but it is not a chant to repeat without thinking. Mirrors come first because you need to know who your signal may affect. If there is a motorcyclist filtering, a cyclist approaching on the left, or a driver close behind, your plan may need to change before you signal.

The manoeuvre part includes position, speed and steering. After checking mirrors, you decide whether a signal is needed, give it in good time if it is, then adjust your road position and speed. If you are turning left into a side road, that might mean checking interior and left mirror, signalling left, gently easing off, positioning correctly and looking into the new road. If you are changing lane, it includes checking the relevant mirror and blind spot before moving.

A very common learner fault is signalling and braking at the same time. The car behind then receives two messages at once, and the driver has less time to respond. Usually, you want mirrors first, then signal, then progressive braking. There are exceptions, such as an urgent hazard, but for planned turns and junctions the signal should give early warning before the main change of speed.

Another common fault is forgetting to cancel the indicator. Modern cars often self-cancel after steering, but not always, especially after a gentle bend or lane change. A left indicator left on after passing a side road can invite someone to pull out in front of you. Make a quick check after the manoeuvre: are you straight, are you at the correct speed, has the signal cancelled?

1.  1 Check mirrors in the direction that matters, usually interior first then the relevant side mirror. 
2.  2 Decide who would benefit from a signal and whether the timing could mislead anyone. 
3.  3 Signal clearly if it helps, using indicators rather than hand gestures. 
4.  4 Adjust position and speed smoothly after the signal. 
5.  5 Look again before moving, especially for cyclists, motorcyclists and pedestrians. 
6.  6 Complete the manoeuvre and cancel the signal if it has not cancelled itself. 

## Signalling at junctions and side roads

At most junctions, you signal if you are turning left or right. The issue is usually timing. Too late, and the driver behind has no useful warning. Too early, and a pedestrian or waiting driver may think you are turning into an earlier road, driveway or car park entrance. In built-up areas, where side roads, bus stops and shop entrances are close together, timing needs real judgement.

For a left turn, check mirrors, especially the left mirror for cyclists and motorcyclists, then signal left in good time. Position normally about a drain cover width from the kerb unless road markings or obstructions say otherwise. Slow enough to make the turn safely and look into the new road before entering. Highway Code Rule 170 reminds drivers to watch out for pedestrians crossing or waiting to cross when turning into a side road, and the 2022 hierarchy of road users changes made that especially important.

For a right turn, check interior and right mirror, signal right, position just left of the centre line where safe, then wait for a safe gap in oncoming traffic. If there is a dedicated right-turn lane, use it properly and signal before entering if it helps others. A test fault I see often is signalling right too late, only after the learner has already moved out. By then, the signal explains what happened rather than warning what is about to happen.

You do not usually need to signal when following the main road ahead, even if the road bends. But be careful where the priority route turns left or right at a junction. If road markings and signs show that the main route bends, your signal should match your intended direction and who needs to know. If you are leaving the main route to go straight ahead, a signal may help, but only if it cannot be misunderstood.

## Roundabouts: the signals learners get wrong most often

Roundabouts are where signal timing really shows. The Highway Code gives specific guidance in Rules 184 to 186. On approach, you should use the correct lane and signal if needed. When leaving the roundabout, you should signal left after you have passed the exit before the one you intend to take, where practical. That left signal tells drivers waiting to enter, and anyone behind you, that you are leaving.

If you are taking the first exit, signal left on approach unless signs or road markings make it a straight-ahead lane arrangement where a signal would confuse. Keep left unless directed otherwise. If you are going ahead at a standard roundabout, you normally do not signal on approach, then signal left to leave after passing the exit before yours. If you are turning right or going full circle, signal right on approach, keep to the right unless markings direct otherwise, then signal left to leave.

Mini-roundabouts catch people out because everything happens quickly. You still need to signal if it helps, but you may not have time for a perfect textbook left signal to leave. The priority is safe positioning, observation and not misleading others. If the roundabout is very small and exits are close together, an early left signal can easily look like you are taking the previous exit.

The fault that costs people is not simply choosing the wrong indicator. It is making another road user act on the wrong information. For example, keeping a right signal on while leaving can make a waiting driver hesitate or, worse, make a cyclist or motorcyclist misread your path. Not signalling left to leave when someone is waiting is usually less severe, but it can still be a fault if the signal would clearly have helped.

[![Keep left arrow — official UK road sign](/signs/keep-left.svg "Keep left arrow")Keep left arrow What it means ](/theory/road-signs/keep-left)

Official UK sign artwork — tap a sign for the full explanation and test questions.

-   First exit: normally signal left on approach and keep left. 
-   Straight ahead: normally no approach signal, then signal left after passing the exit before yours. 
-   Right or full circle: signal right on approach, then left to leave. 
-   Marked lanes: follow signs and road markings, even if they differ from the standard pattern. 
-   Mini-roundabouts: avoid early or rushed signals that could point at the wrong exit. 

## Changing lanes, overtaking and passing obstructions

When changing lanes, a signal is usually needed if another road user could be affected. That includes dual carriageways, one-way systems, busier town roads, spiral roundabouts and approaches to traffic lights. The signal does not give you permission to move. It tells others what you would like to do, then you must wait until it is safe.

On faster roads, check the interior mirror, the relevant side mirror, and the blind spot if necessary. Signal early enough for following traffic to understand, but not so early that drivers think you are moving immediately. Learners sometimes indicate and drift at the same time. On test, that can become serious quickly because a car in the next lane may have nowhere to go.

When overtaking a cyclist, horse rider, parked vehicle or slow-moving vehicle, a signal depends on who is around. If there is traffic behind, a right signal can warn that you intend to move out. If there is oncoming traffic and you cannot yet go, signalling too early may suggest you are about to pull out regardless. The signal should support a safe plan, not replace it.

Passing parked cars is a daily judgement call. If the parked vehicle is far enough from the kerb that you must cross the centre line, and there is someone behind who may not see the obstruction, a signal may help. If the road is empty and your path is obvious, a signal may be unnecessary. What you must not do is signal right and then squeeze through when there is not enough clearance from oncoming traffic.

[![One-way traffic — official UK road sign](/signs/one-way-street.svg "One-way traffic")One-way traffic What it means ](/theory/road-signs/one-way-street)[![Horse riders likely to be on road ahead — official UK road sign](/signs/horse-riders.svg "Horse riders likely to be on road ahead")Horse riders likely to be on road ahead What it means ](/theory/road-signs/horse-riders)

Official UK sign artwork — tap a sign for the full explanation and test questions.

## Pulling up, moving off and parking

When pulling up on the left, signal left if someone would benefit, such as a driver behind, a cyclist behind or a pedestrian near the kerb. If there is no one around, you may not need to signal. On test, examiners often ask you to pull up on the left several times. They are watching whether you check mirrors, choose a safe legal place, signal if needed, and stop smoothly without cutting in on cyclists.

A left signal before pulling up can be misleading if there is a side road, driveway or petrol station entrance just before your stopping point. I have seen learners signal left too early, then drive past a side road while still indicating. A waiting driver at that side road may reasonably think the learner is turning in. In that situation, delay the signal until after the side road, or do not signal if there is no one to inform.

When moving off, signal right only if it helps someone. The essential checks are all-round observation and the blind spot over your right shoulder. If there is a vehicle approaching from behind, a right signal can tell them you intend to move off, but it does not make it safe. If a cyclist is coming past on your right, you wait. If the road is empty, moving off without a signal is often perfectly acceptable.

Parking manoeuvres need the same judgement. For parallel parking, a left signal before stopping can help the driver behind understand why you are slowing. For reversing into a bay, brake lights and reversing lights give information, but a signal may still help depending on position. Avoid waving people round unless it is absolutely clear and safe, and even then remember they must make their own decision.

## When not to signal: avoid misleading other road users

The biggest step up from beginner driving to safe independent driving is learning when not to signal. Early in training, learners often feel safer if the indicator is on. In reality, a bad signal can be worse than silence. It can invite a pedestrian to cross, encourage a driver to pull out, or make a cyclist think you are going somewhere else.

Do not signal just because you are following a routine. Look first, decide who is there, and think about what your signal would mean to them. If there are two possible meanings, change the timing or do not signal yet. A signal should make your intention clearer, not create a puzzle.

Also avoid unofficial signals. Flashing headlights, waving, pointing and using the horn as a friendly message are all risky. The Highway Code says the horn should be used only while your vehicle is moving and you need to warn other road users of your presence. In built-up areas, you must not sound your horn between 11.30 pm and 7.00 am unless another road user poses a danger, according to Highway Code Rule 112. Check GOV.UK for the current wording, as rules can change.

-   Misleading early signal: indicating left before a side road when you intend to stop just after it. 
-   Unnecessary signal: indicating round a parked car when no one is nearby and your path is obvious. 
-   Late signal: indicating only as you start turning, leaving no time for others to respond. 
-   Forgotten signal: leaving the indicator on after a turn or lane change. 
-   Wrong signal: indicating right at a roundabout exit instead of changing to left before leaving. 
-   Unofficial signal: flashing headlights to tell someone to go, rather than simply to warn that you are there. 

## A practical signal decision checklist

Use this checklist in lessons until the judgement becomes natural. The best drivers are not the ones who indicate the most. They are the ones who communicate clearly and safely at the right moment.

If you are preparing for the driving test, practise saying the reason for your signal out loud during quiet parts of a lesson. For example, "left mirror, cyclist behind, left signal after the driveway". It slows your thinking down in a useful way and helps you spot the exact moment a signal becomes helpful rather than misleading.

1.  1 Ask: am I about to change direction, lane, position or speed in a way others may not expect? 
2.  2 Check mirrors first so you know who could benefit from the signal. 
3.  3 Look for places where the signal could be misunderstood, such as side roads, driveways and earlier exits. 
4.  4 Signal in good time if it helps someone, but not before it points to the wrong place. 
5.  5 Do not move just because you have signalled. Recheck and wait until it is safe. 
6.  6 Cancel the signal once the manoeuvre is complete. 
7.  7 If unsure, prioritise safety and clarity over habit. 

## Common questions

### Will I fail my driving test for not signalling once?

Not always. It depends whether the signal was necessary and whether anyone was affected. If no one could benefit, it may not be marked at all, but if another road user is misled, delayed or put at risk, it can become a serious fault.

### Do I have to signal when there are no cars around?

Not necessarily. The Highway Code says signals are to warn and inform other road users, including pedestrians, cyclists and horse riders. If there is genuinely no one to benefit and the road layout is clear, a signal may be unnecessary.

### Should I signal when going straight ahead at a roundabout?

At a standard roundabout, you normally do not signal on approach when going ahead. You should usually signal left after passing the exit before the one you intend to take, where practical, so others know you are leaving.

### Is it wrong to signal right when passing parked cars?

It is not automatically wrong. Signal right if it would help following traffic understand that you need to move out, but avoid signalling too early if you cannot yet pass safely. If the road is empty and your path is obvious, a signal may not be needed.

### Do I need to signal when moving off from the side of the road?

Signal right if it would help another road user, especially traffic approaching from behind. The main requirement is proper all-round observation, including the blind spot. A signal does not give you priority to move off.

### Can I flash my headlights to let another driver go?

You should not use flashing headlights as an invitation. Highway Code Rule 110 says you should only flash your headlights to let other road users know that you are there. If you flash or wave someone on and they move into danger, your signal may have contributed to the confusion.

## Browse driving lessons

Reading about it only gets you so far. Our instructors drill this with you in the car, on the roads around your test centre.

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## On this page

-   [Quick answer: when to signal, and when not to](#s-0)
-   [What the Highway Code expects](#s-1)
-   [Use the right routine: mirrors, signal, manoeuvre](#s-2)
-   [Signalling at junctions and side roads](#s-3)
-   [Roundabouts: the signals learners get wrong most often](#s-4)
-   [Changing lanes, overtaking and passing obstructions](#s-5)
-   [Pulling up, moving off and parking](#s-6)
-   [When not to signal: avoid misleading other road users](#s-7)
-   [A practical signal decision checklist](#s-8)

## Keep reading

-   [Box junctions, yellow lines and road markings](/learn/rules-of-the-road/box-junctions-and-road-markings)
-   [Box junctions: when you can and cannot enter](/learn/rules-of-the-road/box-junctions-explained)
-   [City-centre driving: bus lanes, one-ways and pressure](/learn/driving-well/city-centre-driving)

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