When driving outside of a built-up area, what minimum safety distance should you maintain between you and the vehicle ahead?

The rule for maintaining a safe distance outside built-up areas is to keep at least half of your current speed (in km/h) as the distance in meters between you and the vehicle ahead. For example, if you are driving at 100 km/h, you should maintain a minimum distance of 50 meters. This "half the speed" rule helps ensure you have enough time and space to react and stop safely if the vehicle in front suddenly brakes. Keeping this distance reduces the risk of collisions on faster roads outside towns and cities.