The path to becoming a fully qualified Approved Driving Instructor (ADI) is structured into three distinct stages, or Parts, set by the DVSA. You must pass them in order, and you cannot move on until the previous part is successfully completed.

We call this the qualification pipeline. Understanding the flow is the first step to success.

🗺️ The ADI Qualification Pipeline

The journey is sequential: you must complete Part 1 before moving to Part 2, and Part 2 before moving to Part 3.

Part 1: Theory and Hazard Perception

Objective: To test your detailed knowledge of the Highway Code, instructional techniques, and the underlying theories of driving safety and learning.

Format: A computer-based test split into two sections:

Multiple-Choice Questions: 100 questions covering four main subject areas. You need a score of 85/100 to pass.

Hazard Perception (HPT): 14 video clips containing 15 developing hazards. You need a score of 57/75 to pass.

Key Takeaway: This part is mainly self-study and proves you have the comprehensive foundational knowledge required to teach. You have a two-year time limit from passing Part 1 to pass Part 3. If you don't, you must start the entire process over.

Part 2: Driving Ability

Objective: To test your personal driving skill against an advanced standard—much higher than the standard required for a learner's test. You must demonstrate expert handling and observation.

Format: A practical driving test lasting around one hour. It includes:

Advanced Sight Test: Reading a number plate from 26.5 meters.

Driving Section: Testing your technique, awareness, and safe manoeuvring. You will be asked to perform two manoeuvres and an independent driving section.

"Show Me, Tell Me" Questions: Before and during the drive, the examiner will ask you five vehicle safety questions. Three will be "Tell Me" questions (where you explain how you would carry out a safety check, asked before driving) and two will be "Show Me" questions (where you demonstrate the check while driving). A fault here counts as a driving fault.

Key Takeaway: You are allowed a maximum of six driving faults. More than six, or a single serious or dangerous fault, results in a failure. You get a maximum of three attempts to pass Part 2.

Part 3: Instructional Ability (The Standards Check)

Objective: This is the most difficult and high-stakes test. It tests your ability to teach a pupil in a safe, structured, and client-centred way.

Format: A one-hour practical test where an examiner watches you deliver a real lesson to a pupil (who must be a real learner or a qualified driver). The examiner assesses your ability across 17 different competencies, graded from 0 to 3.

The Big Difference: This test is about coaching, not just talking. The DVSA is looking for evidence of fault analysis, risk management, and teaching that is responsive to the pupil's needs.

Key Takeaway: You get a maximum of three attempts to pass Part 3. Failure on the third attempt means you are removed from the register, and you must wait until the two-year period from your Part 1 pass expires before starting the entire qualification process again. This is why high-quality, specialised training is essential.

This three-part structure is challenging but manageable with the right guidance.