What is the typical overall stopping distance at 40 mph in good, dry conditions?

Explanation: Your vehicle type, model, and condition all affect stopping distance, as do the road surface, weather conditions, and your reaction time. Pay attention to the road well ahead. Looking for hazards that could emerge reduces the likelihood of you needing to brake suddenly. Additionally, you should always ensure you leave a big enough gap between you and the vehicle in front so you can stop safely.

Category: Safety margins (2021)

References: Highway Code: Rule 126