Step 1. The big picture
In one sentence…
Road safety combines prevention, occupant protection and the correct reaction to an emergency. The theory exam usually mixes active safety, passive safety and the PAS response within the same question, so always study cause, consequence and safe conduct together.
Step 2. The syllabus
2.1Active safety
Active safety helps to avoid the accident: brakes, steering, tyres, suspension, lighting and electronic aids all work before the impact.
- These elements only work well if the driver maintains the vehicle and adapts their driving. A poor tyre or badly used light reduces your margin before danger strikes.
- In the exam, a question may mention rain, a bend or braking to check whether you know active safety also depends on grip and anticipation.
- Don't confuse electronic aids with permission to take risks. Their role is to support, not to compensate for inadequate speed or insufficient distance.
2.2Passive safety
Passive safety reduces injuries once the accident can no longer be avoided: seatbelt, headrest, airbags, the vehicle's structure and child restraint systems.
- A badly adjusted headrest or a loose seatbelt can turn an apparently minor rear-end collision into a serious injury for any occupant.
- The airbag does not replace the seatbelt. In questions about occupants, the correct answer usually requires both systems to work together.
- Passive protection starts before you set off: seat, backrest, headrest, seatbelts and loose objects must all be under control so as not to increase harm.
2.3Seatbelt and posture
The seatbelt must be used whenever the vehicle is fitted with one, and it must be well adjusted, without slack or twists.
- Correct posture lets you control the pedals, steering wheel, mirrors and controls without stretching. It also helps the seatbelt, headrest and airbag protect you as they should.
- Don't fit clips, cushions or thick clothing that leave dangerous slack. In an impact, these details change how effective the system really is.
- In tests, be wary of answers that accept wearing the seatbelt any old way for short trips, low speed or rear seats.
2.4Child restraint systems
Minors must travel in the child restraint system suited to their height, weight and type approval, following the seating positions and conditions set out in law.
- The driver must make sure the system is installed and used correctly. It's not enough for the minor to be sitting in just any device.
- The question may not ask for a figure: it may ask for the principle. A minor travels protected when the system matches their characteristics and is fitted correctly.
- If in doubt between comfort and safety, choose safety. The rule aims to reduce injuries even if the trip is short or the minor complains.
2.5The PAS response
The safe sequence follows the PAS principle: protect the area, alert the emergency services and assist without worsening injuries or creating another danger.
- Protecting means preventing further collisions before helping. Park safely, make yourself visible and assess the traffic so you don't become another victim.
- Alerting requires clearly conveying where you are and what has happened. Don't improvise rescue manoeuvres that could worsen injuries unless they are essential.
- Assisting doesn't always mean moving the injured person. In the exam, the cautious answer is usually to stay with them, avoid additional risks and wait for qualified help when appropriate.
2.6Breakdown and immobilisation
Since 1 January 2026, the connected V16 light is the official reference for pre-signalling an immobilised vehicle for those vehicles required to carry the device.
- Before helping, avoid becoming a new victim: park safely, use visibility items and don't step onto the carriageway without controlling the risk.
- In a breakdown, the priority is not to get the vehicle moving quickly again, but to reduce your own exposure and that of other road users.
- Questions often pit haste against safety. Always choose the orderly response: protect first, alert next, and only assist if you don't worsen the danger.
2.7Exam preparation
Classify each element as active or passive and say what risk it reduces. This method stops you learning lists without understanding why they appear together in a question.
- Practise cases: rear-end collision, rollover, rain, a night-time breakdown and a child occupant. In each one, decide which system prevents and which protects.
- The B theory test is 30 questions with a maximum of 3 errors in 30 minutes. It pays to master these topics because they tend to appear with very everyday scenarios.
- When an answer plays down a measure because the trip is short, it's usually suspect. Road safety applies whenever you're driving.
Step 3. Key points
If you only have a minute before the exam, revise this.
- 1.Tell active and passive safety apart with real examples.
- 2.Adjust the seat, seatbelt and headrest before setting off.
- 3.Use the seatbelt, airbag and child restraint systems correctly.
- 4.Apply PAS without putting yourself in danger or worsening injuries.
- 5.Know the official reference for the connected V16 light in 2026.
- 6.Link basic maintenance to the effectiveness of brakes, lights and tyres.
- 7.Be wary of answers that justify skipping measures on short trips.
Step 4. Exam traps
Mistakes the DGT uses again and again on this topic.
- Thinking that wearing the seatbelt any old way is enough.
- Confusing an active safety element with a passive one.
- Getting out of the vehicle without assessing the road's risk during a breakdown or accident.
- Believing the airbag replaces the seatbelt.
- Moving an injured person unnecessarily and without assessing whether you might worsen their injuries.
- Forgetting that the connected V16 is the official reference from 1 January 2026.
Step 5. Quick check
Four real exam questions on what you have just read.
Question 1/4
In a hydraulic brake system, which of these factors can cause a spongy pedal?
Step 6. Frequently asked questions about brakes and braking
- In a car’s conventional hydraulic brakes, which of these situations is NOT a usual cause of reduced effectiveness?
- Their normal cooling after use. Normal cooling of the brakes after use is not a usual cause of reduced effectiveness. By contrast, a fluid leak or excessive pad or shoe wear compromises operation. Overheating can also reduce effectiveness. This does not mean that every cooling process or any extreme condition is always harmless.See full question
- What use of the brakes can cause them to overheat?
- Maintaining prolonged friction between pads and discs or shoes and drums. Prolonged friction from keeping the brakes applied can generate more heat than can be dissipated. In disc brakes, pads contact discs; in drum brakes, shoes contact drums. Excessive temperature can reduce braking effectiveness and, under certain conditions, cause vapour in the fluid. A leak or air in the circuit are serious faults, but do not describe this friction-related heating.See full question
- If a vehicle’s brakes get wet, what can happen?
- They may temporarily lose effectiveness. They may temporarily lose effectiveness. If conditions allow it safely, check their response and apply the brakes gently to help dry them, following the vehicle manual. Do not continue if braking is unsafe: stop safely and request assistance. Do not confuse wet brakes with inevitable wheel lock or with loss of grip from aquaplaning. Do not enter a flooded area without understanding the risks.See full question
- Which of these names is not a prescribed braking-system function: service, secondary or parking?
- Bodywork brake. Bodywork brake is not one of those functions. Parking braking keeps the vehicle stationary; secondary braking allows slowing and stopping if service braking fails, under applicable requirements. Engine braking does exist as a retarding effect and must not be denied: it is not a function called bodywork brake. Parking braking may be operated by means other than a manual lever.See full question
- In a vehicle with hydraulic brakes, which check forms part of their maintenance?
- Check the brake fluid level. Periodically check brake-fluid level according to the manual, together with checks of the circuit and wearing components. Abnormal level or loss requires inspection; simply topping up does not fix a possible leak. Keep lubricant off friction surfaces and do not replace inspection with a dangerous braking test. Not all braking systems use the same hydraulic circuit or parking-brake adjustment.See full question