Truck & Bus Theory IrelandHow it works
Both the truck and bus case study tests ask you to look at three real-life situations a professional driver might face. Each test is computer-based, and works as follows:
- You are asked 15 questions on each of three real-life driver situations — 45 questions in total.
- To pass you must score at least 5 out of 15 in each situation and have an overall score of at least 28 out of 45.
The test takes about 120 minutes.
Two conditions, not one. Twenty-eight out of forty-five is 62% overall, which sounds forgiving. But a candidate who scores 14, 14 and 4 has 32 marks overall and still fails, because one situation fell below 5. Conversely 5, 5 and 5 clears every per-situation floor and fails on the overall. You have to clear both at once.
Where you can sit it
Unusually, the case study test can be taken at home or at one of the forty-plus theory test centres nationwide. That is a genuine convenience, but the at-home option puts the burden of a quiet, uninterrupted two hours on you. Two hours is long enough that a household interruption is a real risk to the result.
What you need first
You must have passed the Driver CPC theory test (Step 1) in the relevant category before you can sit your case study test. See the truck theory test.
Results and the certificate
You are given a score report telling you whether you passed or failed.
On a pass, you are issued with a Driver CPC case study test certificate valid for up to two years, and you should apply for a learner permit within that time. After two years the certificate is no longer valid and you will have to pay for and sit the case study test again.
On a fail, the score report comes with feedback telling you where you went wrong. You can book another case study test straight away, but you cannot take it for another three clear working days.
Rescheduling and cancelling
A cancellation or rescheduling request must be submitted at least five days before your test booking, and those five days must include three working days. That is a stricter and differently-worded rule than the ordinary theory test’s notice periods, so do not assume they are the same.
How to prepare for it
The case study test rewards different preparation from the theory test. The questions sit inside a scenario, so the skill being tested is applying a rule to a situation that contains irrelevant detail as well as relevant detail.
- Practise whole case studies, not loose questions. Fifteen questions on one scenario is a different cognitive task from fifteen unrelated questions, and the per-situation floor means a bad scenario is fatal.
- Read the scenario before the questions. Facts planted early — a departure time, a load type, a tachograph reading — are usually load-bearing later.
- Mark yourself on both conditions. A practice score that reports only an overall percentage hides exactly the failure mode that catches people.
- Study the Rules of the Road. The RSA names it directly as case-study preparation, alongside the official driver theory test truck and bus book.
The RSA also has approved Driver CPC trainers who can help you prepare for the case study test.
Frequently asked questions
What is the pass mark for the Driver CPC case study test?
There are two conditions and you must meet both: at least 5 out of 15 in each of the three case studies, and at least 28 out of 45 overall. Clearing only one of the two is a fail.
How long is the Driver CPC case study test?
About 120 minutes, covering three real-life situations with 15 questions each. Some secondary sites quote around 135 minutes; the RSA’s own category C and D pages both say about 120.
Can I take the Driver CPC case study test at home?
Yes. You have the option of sitting it at home or at one of the forty-plus theory test centres nationwide. If you sit it at home, make sure you have an uninterrupted two hours.
How soon can I retake the case study test after failing?
You can book another test straight away, but you cannot take it for another three clear working days. Your score report comes with feedback on where you went wrong.
How long is the case study test certificate valid?
Up to two years. You should apply for a learner permit within that time; after two years the certificate is no longer valid and you have to pay for and sit the test again.
Practise the real test shape
Truck & Bus Theory Ireland turns this material into practice: full 100-question category C and D mocks, the truck and bus module tests, the combined CD paper, and 45 Driver CPC case studies marked on both pass conditions.
Independent guide: TritonApps is not affiliated with, endorsed by, or approved by the Road Safety Authority or the Driver Theory Test service. This page summarises published guidance for convenience and is not official advice. Always confirm current requirements and fees with the RSA before you book.