The DGT common theory test checks whether you understand the rules and can apply them to drive safely. It is not just a memory test about signs. It also covers priorities, hazard perception, interaction with other road users, the effects of alcohol, fatigue and medicines, vehicle safety and what to do after a collision.
The usual category B format
The category B common test is normally completed on a computer and has 30 multiple-choice questions. Candidates select the answer or answers they consider correct. Many questions have three options and one correct answer, but the regulations allow a question to have between one and four correct answers. Read the wording and the instructions on screen carefully.
The general time allowance is one minute per question. If a video is shown, the time may be extended to account for its duration; an extension may also be granted for justified special needs. The test is marked as pass or fail. The current common test allows up to three errors. Always check the information for your own appointment: regulations set general limits and the administration can update the practical arrangements.
What you need to know
Rules and road signs are essential, but they are only part of the syllabus. Review priority and speed, road position and lane use, manoeuvres, safe following distances and braking. You should also study visibility and lighting, vehicle documents and condition, passengers and loads, vulnerable road users, tunnels and weather conditions.
Road safety runs through every topic. Understand how speed, alcohol, drugs, some medicines, sleepiness and emotions affect perception and decision-making. Practise questions with pictures and videos by first observing the situation, identifying the hazard and then choosing the rule that applies.
On the day of the test
Follow the instructions from the traffic office or centre arranging your test. Bring valid identification and arrive in good time. During the test, read every question in full, watch for words such as “except” or “always”, and review the options before confirming. Do not choose an answer just because you recognise a picture: consider the context, signs and actions of every road user.
Phones and communication devices cannot be used during the test. If you do not know how to operate the computer, ask the staff before starting rather than trying to work it out during the test.
How to prepare effectively
Start by learning one topic and explaining the rule in your own words. Then answer practice questions without rushing and read why each option is right or wrong. Keep track of recurring mistakes and revisit the underlying idea instead of memorising the answer.
Once your scores are consistent across varied mock tests, practise under time limits. Keep a short list of remaining questions to review before the appointment and get enough rest. A learning platform can help you structure your study, but for dates, requirements and official results, always follow the DGT’s information.
Official sources
Rules and procedures checked on 25 September 2026. Check the official sources for any later changes.
