Hazard perception explained

Understanding Hazard Perception - A Key Component of the Theory Test

The hazard perception test is an integral part of the UK theory test, designed to assess your ability to identify developing hazards on the road. Here's an overview of what you need to know:

Hazard Perception Test Structure

The hazard perception test consists of 14 computer-generated imagery (CGI) video clips, featuring various everyday road scenes. Each clip contains at least one developing hazard, and one of the clips will have two developing hazards to spot. 

Pass Marks for Hazard Perception Test 

The pass marks for the hazard perception test vary depending on the category of vehicle: 

Car and Motorcycle: 

  • Number of clips: 14 
  • Developing hazards: 15 
  • Pass mark: 44/75 

Lorry, Coach, and Bus Hazard Test: 

  • Number of clips: 19 
  • Developing hazards: 20 
  • Pass mark: 67/100 

ADI Theory Test Hazard Perception Part 1: 

  • Number of clips: 14 
  • Developing hazards: 15 
  • Pass mark: 57/75 

Understanding Developing Hazards 

A developing hazard refers to any situation on the road that may require you to take some action while driving. This action can involve changing your speed, direction, or making other maneuvers to respond effectively. Developing hazards are typically events that unfold over time, such as pedestrians stepping onto the road, vehicles emerging from side roads, or changes in traffic flow. 

Mastering Hazard Perception 

To excel in the hazard perception test, consider the following tips:

Practice regularly 

Utilize online platforms or DVDs that offer hazard perception practice clips. Familiarize yourself with different road scenarios and train your ability to spot developing hazards. Stay attentive: During the hazard perception test, remain focused and observant. Pay close attention to potential hazards that may arise throughout each video clip.

Anticipate actions

Develop the skill of anticipating how a hazard might evolve and the actions you would need to take. This includes adjusting your speed, positioning, or signaling to navigate the hazard safely. 

Timing is crucial

Remember, early detection of a developing hazard earns more points than a delayed response. Train yourself to identify hazards as soon as possible to maximize your score. By understanding the concept of developing hazards, practicing regularly, and adopting a vigilant mindset, you can enhance your hazard perception skills and increase your chances of success in the theory test. 


It is important to refer to the official DVSA guidelines and materials for the most accurate and up-to-date information regarding hazard perception and pass marks.