How long should the brake application last when slowing down?

The brake application should last approximately three seconds when slowing down because this timeframe allows for a smooth and controlled deceleration without causing sudden jerks that could destabilize the vehicle or cause skidding. A three-second brake application is generally sufficient to bring the vehicle to a safe stop while providing adequate time for both the driver and surrounding traffic to respond appropriately to the deceleration.

This duration helps maintain control especially in larger vehicles, which require a longer stopping distance compared to passenger cars. It is essential to begin braking early enough, with the three-second guideline serving as a benchmark for safe driving practices. This ensures that you can adjust your speed gradually, enhancing safety for both the driver and other road users.

Longer durations, such as five or ten seconds, could lead to unnecessary delays, and may obstruct traffic or create hazardous situations on the road. Conversely, skipping a specific time might lead to abrupt stops that could be dangerous. Therefore, a three-second application strikes a balance between maintaining control and ensuring safety.