Alertness: car theory test questions
Staying focused behind the wheel: tiredness, distractions, mobile phones, mirrors and checking blind spots before you move. Practise 25 free alertness questions with instant answers and explanations – no sign-up.
- 25 questions
- Instant feedback
- Highway Code references
Alertness: revision notes
The alertness topic checks that you can stay focused, notice what is happening around you and avoid anything that pulls your attention away from the road. Expect questions on tiredness, phones, sat navs, mirrors and blind spots.
- Breaks: plan a break of at least 15 minutes after every two hours of driving, and avoid long journeys between midnight and 6 am (rule 91).
- Feeling sleepy: stop somewhere safe. Never use the hard shoulder or an emergency area for a rest (rules 91 and 262).
- Phones: you must not use a hand-held phone while driving, even when stopped in traffic. The only exceptions are a genuine 999 or 112 emergency when it is unsafe to stop, and a contactless payment while stationary (rule 149).
- In-car tech: set your sat nav before you set off and treat driver assistance systems as an aid, not a replacement for you (rule 150).
- Mirrors and blind spots: use your mirrors often, and look round before moving off because mirrors do not show everything (rules 159 and 161).
Tip: lots of these questions describe a tempting shortcut, like answering a call at red lights. If an answer takes your eyes, hands or mind off driving, it is almost always wrong.
All alertness questions and answers
Revise every question in this topic. Tap a question to see the correct answer and why.
1You're on a long motorway journey and keep yawning and losing concentration. What should you do?
- Leave at the next exit or services and rest ✓
- Open a window and carry on, as fresh air will help
- Turn the radio up loud to keep yourself awake
- Pull onto the hard shoulder and have a short nap
Answer: Leave at the next exit or services and rest. Tiredness greatly increases your risk of a collision. Leave the motorway and rest somewhere safe; the hard shoulder and emergency areas are only for emergencies.
Highway Code rules 91 and 262
2How often does The Highway Code recommend you take a break on a long drive?
- At least 5 minutes after every hour of driving
- At least 30 minutes after every four hours of driving
- At least 15 minutes after every two hours of driving ✓
- Only once you start to feel tired
Answer: At least 15 minutes after every two hours of driving. Planning regular breaks keeps you alert. A break of at least 15 minutes after every two hours of driving is the recommended minimum.
Highway Code rule 91
3Between which hours is natural alertness at its lowest, making long journeys more risky?
- 10 am and midday
- Midnight and 6 am ✓
- 6 am and 9 am
- 6 pm and 10 pm
Answer: Midnight and 6 am. Your body is least alert between midnight and 6 am, so The Highway Code advises avoiding long journeys during those hours.
Highway Code rule 91
4Your mobile phone rings while you're driving and you have no hands-free kit. What should you do?
- Answer it quickly while keeping one hand on the wheel
- Answer it only if you're moving slowly in traffic
- Pick it up and switch it to speaker on your lap
- Let it ring and check your messages once you've parked safely ✓
Answer: Let it ring and check your messages once you've parked safely. You must not use a hand-held phone for any purpose while driving. Ignore the call and deal with it when you've stopped somewhere safe.
Highway Code rule 149
5You're stuck in stationary traffic on a busy road. Which statement about using a hand-held phone is correct?
- You can use it as long as the parking brake is on
- You must not pick it up and use it, even though you've stopped ✓
- You can make calls but must not send messages
- You can send a text if the traffic has been still for a minute
Answer: You must not pick it up and use it, even though you've stopped. The ban on hand-held phones still applies when you're stopped in traffic, because you're still driving. The queue could move off at any moment.
Highway Code rule 149
6In which situation does the law allow you to use a hand-held phone while driving?
- To answer an urgent call from your employer
- To check a map app when you're lost on an unfamiliar road
- To call 999 or 112 in an emergency when it's unsafe to stop ✓
- To tell someone at home that you're running late
Answer: To call 999 or 112 in an emergency when it's unsafe to stop. The only driving exception is a genuine emergency call to 999 or 112 when it's unsafe or impractical to stop (plus contactless payment while stationary).
Highway Code rule 149
7Why can using a hands-free phone while driving still be dangerous?
- The conversation can take your attention away from the road ✓
- It is illegal to use one on any type of road
- It drains the car's battery faster than normal driving
- It interferes with the car's warning lights
Answer: The conversation can take your attention away from the road. Even without holding the phone, a conversation can distract you. The safest choice is not to use any phone while driving.
Highway Code rule 149
8You need to enter a new destination into your sat nav during a journey. What should you do?
- Type it in while driving slowly in a queue
- Steer with one hand and use the screen with the other
- Type it in while you wait at a red traffic light
- Find a safe place to stop before you change it ✓
Answer: Find a safe place to stop before you change it. In-vehicle systems can be a serious distraction. If you need to adjust them, stop somewhere safe first.
Highway Code rule 150
9Your car has lane departure warning and motorway assist. How should you use these systems?
- Only in fog, when you can't see the lane markings
- As an aid, while staying fully alert and in control ✓
- As a way to keep a safe gap so you needn't check it
- As a reason to relax and check messages on long trips
Answer: As an aid, while staying fully alert and in control. Driver assistance systems are there to help, not to take over. You are still responsible for the vehicle and must keep your concentration.
Highway Code rule 150
10You're about to pull away from the side of the road. What should you do just before moving off?
- Flash your headlights to show you're about to leave
- Rely on your door mirror, as it shows the area behind
- Sound the horn to warn anyone nearby
- Look round over your shoulder to check the blind spot ✓
Answer: Look round over your shoulder to check the blind spot. Mirrors don't show everything. Before moving off, use all mirrors, check the blind spot and take a final look round.
Highway Code rule 159
11What is meant by a 'blind spot' when you're driving?
- A gap between two parked vehicles
- A bend where you can't see the road beyond it
- An area around your car that your mirrors don't show ✓
- A stretch of road that has no street lighting
Answer: An area around your car that your mirrors don't show. Blind spots are the areas your mirrors don't cover. You need to look round to check them before moving off or changing lanes.
Highway Code rule 159
12When should you check your mirrors?
- Often, and well before you signal or change speed or direction ✓
- Only when you're about to reverse or park the car
- Only after you've signalled and just before you turn
- Only when another driver flashes their headlights at you
Answer: Often, and well before you signal or change speed or direction. Frequent mirror checks mean you always know what is behind and beside you. Remember the routine: Mirrors – Signal – Manoeuvre.
Highway Code rule 161
13Low, bright sunlight is dazzling you as you drive. What should you do?
- Close up behind the car in front to follow its lights
- Speed up so you're in the glare for less time
- Switch on your hazard warning lights and carry on
- Slow down and, if necessary, stop ✓
Answer: Slow down and, if necessary, stop. If you can't see properly you can't react to hazards. Slow down, and stop if you need to, until you can see clearly.
Highway Code rule 93
14You're dazzled by the headlights of an oncoming car at night. What should you do?
- Switch to main beam so you can see better
- Flash your headlights at the other driver
- Slow down, and stop if necessary ✓
- Look directly at the oncoming lights
Answer: Slow down, and stop if necessary. Being dazzled can leave you briefly unable to see. Slow down or stop rather than driving on blind, and never try to dazzle the other driver back.
Highway Code rule 115
15Is it safe to wear tinted glasses when driving at night?
- No, not if they restrict your vision ✓
- Yes, as long as the road has street lighting
- Only when you're driving on a motorway
- Yes, they cut glare from oncoming headlights
Answer: No, not if they restrict your vision. Tinted glasses, lenses or visors reduce the light reaching your eyes. At night or in poor visibility, don't use them if they restrict your vision.
Highway Code rule 94
16Mark two answers. Which of these does The Highway Code list as distractions to avoid while driving?
- Keeping both hands on the wheel
- Eating and drinking ✓
- Starting or adjusting music or the radio ✓
- Scanning the road far ahead
- Checking your mirrors
Answer: Eating and drinking; Starting or adjusting music or the radio. Anything that takes your eyes, hands or attention away from driving is a distraction. Checking mirrors and scanning ahead are part of driving safely.
Highway Code rule 148
17Why can playing music very loudly while you drive be dangerous?
- It can cause the car's electrical system to overheat
- It may stop you hearing sirens, horns and other warnings ✓
- It's illegal to play music at any volume
- It makes the engine use noticeably more fuel
Answer: It may stop you hearing sirens, horns and other warnings. Loud music can mask important sounds around you, such as emergency vehicle sirens.
Highway Code rule 148
18Your passengers are being noisy and urging you to drive faster. What should you do?
- Speed up a little so that everyone stays happy
- Turn round so you can talk to them face to face
- Argue with them until they agree to stop distracting you
- Tell them you need to concentrate and keep to a safe speed ✓
Answer: Tell them you need to concentrate and keep to a safe speed. You are responsible for your passengers' safety. Don't let them distract you or push you into taking risks.
Highway Code: Annex 8 (Safety code for new drivers)
19You're waiting to emerge from a side road. A car approaching from your right is signalling left. What should you do?
- Wait until you're sure it's actually turning before you pull out ✓
- Sound your horn and then move off
- Pull out straight away, because it's going to turn
- Flash your headlights so the driver knows you're about to go
Answer: Wait until you're sure it's actually turning before you pull out. Indicators are sometimes left on by mistake. Don't assume a vehicle will turn just because it is signalling; wait until you're sure.
Highway Code rules 104 and 170
20A driver flashes their headlights at you while you wait at a junction. What should you do?
- Go at once, because they're showing you have priority
- Flash your headlights back and wait for them to move
- Use your own judgement and only go when you're sure it's safe ✓
- Sound your horn to confirm, then pull out
Answer: Use your own judgement and only go when you're sure it's safe. Flashing headlights only means 'I am here'. Never treat it as a signal to go; check for yourself that it's safe.
Highway Code rule 111
21As well as the driver, who must not use a hand-held mobile phone in the car?
- Passengers under 18 years old
- Someone supervising a learner driver ✓
- Rear-seat passengers on motorways
- Any passenger in the front seat
Answer: Someone supervising a learner driver. The hand-held phone ban applies to the person driving and to anyone supervising a learner, because they need to watch the road too.
Highway Code rule 149
22Why can long motorway journeys make you feel sleepy?
- The driving can be monotonous, with little change around you ✓
- The road surface is rougher than on most other roads
- The speed limits are lower than on other roads
- There are too many junctions and signs to look out for
Answer: The driving can be monotonous, with little change around you. The monotony of motorway driving can make you drowsy. Plan breaks and use services if you start to feel tired.
Highway Code rule 262
23Mark two answers. Before setting out on a long journey, what should you do to help you stay alert?
- Drive overnight when the roads are quieter
- Get enough sleep the night before ✓
- Keep the heater turned up high
- Plan regular breaks into your route ✓
- Skip breaks so you arrive sooner
Answer: Get enough sleep the night before; Plan regular breaks into your route. Don't start a journey if you're tired. Get sufficient sleep beforehand and plan your route so you can take regular breaks.
Highway Code rule 91
24You want to change lanes on a dual carriageway. What should you do first?
- Sound your horn to warn the other drivers
- Brake gently to make space behind you
- Check your mirrors and the blind spot if needed ✓
- Signal and move across straight away
Answer: Check your mirrors and the blind spot if needed. Before changing lanes, use your mirrors and check the blind spot so you don't force anyone to change speed or course.
Highway Code rule 133
25A message pops up on your car's touch screen while you're driving at 50 mph. What should you do?
- Leave it until you can stop somewhere safe to read it ✓
- Slow down to 30 mph and then read it
- Reply using the voice and touch controls
- Read it quickly on the next straight stretch
Answer: Leave it until you can stop somewhere safe to read it. Screen-based information can take your eyes off the road for a dangerous length of time. Wait until you have stopped safely.
Highway Code rule 150
Frequently asked questions
What does the alertness topic cover in the theory test?
It covers concentration and observation: tiredness and breaks, distractions such as phones and sat navs, using mirrors, checking blind spots and reacting to dazzle from sunlight or headlights.
How often should I take a break when driving?
The Highway Code recommends a break of at least 15 minutes after every two hours of driving (rule 91). If you feel sleepy before then, stop somewhere safe and rest.
Can I use my phone hands-free while driving?
Hands-free use is not banned, but The Highway Code warns it can still distract you and says it is far safer not to use any phone while driving (rule 149). Find a safe place to stop or let calls go to voicemail.
Original practice questions based on The Highway Code (Open Government Licence v3.0). Not the real test questions. MockTheory is not affiliated with or endorsed by the DVSA.
