Stopping distances driving testDuring a practical driving test, you will not be asked any questions about stopping distances by the examiner at any point. This will have been covered in the theory test. The examiner will however expect that you know the correct stopping distances and to put them into practice during your test. For example, not driving too close to a vehicle in front and increasing stopping distance if it begins to rain. It can of course be difficult to judge distances in feet whilst driving for anyone. This is why the 2 second rule was developed, to help drivers establish a safe following distance behind another vehicle. Read the 2 second rule tutorial complete with diagram to aid understanding. The 2 second rule is multiplied by 2 if it starts to rain.
Braking techniquesTo remain safe whilst driving, it's important to use braking techniques. See braking for a guide to progressive braking techniques.

Thinking distanceThinking distances is dependent on the driver and other than the speed at which the vehicle is traveling, can be increased (taking longer to react) by:
Braking distanceOther than the speed at which a vehicle is traveling, braking distance is affected and can be increased by:
Stopping distances graphThe stopping distance graph below gives a visual representation of the increase in braking distance the faster a vehicle travels. The braking distance in blue is doubled for wet conditions and is multiplied by 10 in icy conditions. Stopping distances chart in feetThe following stopping distance chart is based on a typical car, in good, legal condition, good weather and on dry well maintained roads. The following chart is for stopping distances in feet based on UK speed limits..
Stopping distances chart in metresAs above, the following chart is based on a typical car, with legal tyres, good brakes and good weather / dry roads. The following chart is for stopping distances in metres based on UK speed limits.
Stopping distances formula(speed) ² ÷ 20 + thinking distance = overall stopping distance in feet For stopping distance formula in metres, multiply the result by 0.3 Stopping distance in rainDue to significantly reduced friction between the tyres and road surface, the above stopping distances are multiplied by 2 for stopping distances in rain. Stopping distance on iceThe stopping distances above based on dry conditions should be multiplied by 10 for stopping distances on ice. Stopping distance formula examplesThe following stopping distance formulas are based on traveling at a speed of 20 mph. Stopping distance in feet Stopping distance in metres Stopping distance in rain Stopping distance on ice Stopping distances theory testThe UK theory test involves questions on stopping distances. Although stopping distances are explained above, an easy way for how to remember the overall stopping distances are as follows. When asked for a stopping distance, simply remember the 2 / 2.5 / 3 / 3.5 / 4 / 4.5 from below to work out the overall stopping distance.
