The ADI Part 1 Trap: You Can Score 85 and Still Fail

The approved driving instructor part 1 test is the theory stage of qualifying to teach, and it contains a rule that catches out a steady stream of otherwise well prepared candidates. You can hit the headline pass mark on the multiple-choice paper and still be told you have failed. It is not a glitch and it is not harsh marking. It is a banded pass mark, and once you understand it, it changes how you should revise.

Two conditions, and you have to meet both

The multiple-choice part of ADI part 1 is 100 questions with a time limit of one hour and 30 minutes. To pass it you need an overall score of at least 85 out of 100. That is the number everybody knows.

The second condition is the one that does the damage. The 100 questions are split into 4 categories of 25, and you must score at least 20 out of 25 in every single one of them. The DVSA states the consequence plainly: you will fail if you get an overall score of 85 or higher but do not score high enough in each of the 4 categories.

So a candidate who scores 25, 25, 24 and 19 has 93 out of 100, comfortably above the headline mark, and has still failed. There is no rounding, no compensation between bands, and no discretion.

The four bands, and where people fall down

The categories are road procedure; traffic signs and signals, car control, pedestrians and mechanical knowledge; driving test, disabilities and the law; and publications and instructional techniques.

The first two feel familiar to anyone who has been driving for years, which is precisely the problem. Candidates lean into them because the material is comfortable, and the band that quietly sinks them is usually the fourth one. Publications and instructional techniques is not general driving knowledge at all. It is about the training materials, the teaching methods and the professional side of the job, and it is the section a competent experienced driver has genuinely never studied. The third band is similar territory: the mechanics of the driving test itself, disability provision and the law around instruction.

Treat those two bands as the real syllabus. If you can only give one band extra attention this week, make it publications and instructional techniques.

The hazard perception half

ADI part 1 also includes a hazard perception section, and you must pass both parts to pass the test. The pass mark here is 57 out of 75, which is a noticeably higher bar than learner candidates face on the car test.

The scoring rules are the ones you already know. Click as soon as a hazard genuinely starts to develop, and you lose nothing for a click that turns out to be wrong. But clicking continuously or in a pattern scores you nothing on that clip, and you get one attempt with no chance to review. Instructors sitting this test tend to see hazards early, which is an advantage, but only if the clicking is disciplined.

You can take a break of up to 3 minutes between the multiple-choice questions and the hazard perception section. Use it.

What a fail actually costs

If you fail, you get a letter at the test centre telling you which parts you did not score enough points on. You then have to book and take the full test again, both halves, even if you sailed through one of them. You must wait at least 3 working days before you can sit it again, and the fee is payable each time.

There is a longer clock too. If you pass, your pass certificate number lasts for 2 years, and you must qualify as an approved driving instructor within that window. Miss it and you start the whole application process from the beginning, so a resit is not just a fee, it is time out of a fixed two year budget you will also need for parts 2 and 3.

Revise so that no band is your weak one

The practical takeaway is simple. Stop tracking your overall percentage and start tracking your worst band. A mock score of 88% tells you almost nothing useful; a breakdown showing 19 out of 25 on instructional techniques tells you exactly what to do next.

Practise in banded sets rather than mixed papers, at least until every category is sitting comfortably above 20, and only then go back to full mock tests to build stamina for the 100 question sitting. Theory Test Passed is DVSA licensed and carries the ADI question bank, so you can drill the categories that actually decide your result instead of revising the ones that feel easiest.