In congested city traffic, closing up on the vehicle ahead feels natural — it's how everyone around you behaves. But on a UK driving test, following too closely is a serious fault. The examiner is watching not just for whether you hit anything, but for whether you're maintaining a safe space that gives you time to react.
The Two-Second Rule
The Highway Code recommends at least a two-second gap between your vehicle and the one in front in dry conditions. To measure it: when the car ahead passes a fixed point (a lamp post, road sign), start counting — 'only a fool breaks the two-second rule.' If you reach the same point before finishing the count, you're too close.
- Dry conditions: minimum 2 seconds
- Wet conditions: minimum 4 seconds
- Ice or snow: 10x normal stopping distance
- Motorway at 70mph: 2 seconds = about 38 metres
Tyres and Tarmac at Junctions
When stopped behind a vehicle at traffic lights or a junction, the Highway Code guidance is to stop where you can see the tyres of the vehicle ahead touching the road — the 'tyres and tarmac' rule. This leaves enough space to pull around if the vehicle ahead breaks down, and prevents you from being pushed into it if struck from behind.
Why City Drivers Close the Gap
In Hong Kong, and in many UK cities during rush hour, closing up on the vehicle ahead feels socially normal — as if leaving space invites someone to cut in. On a driving test, this habit will cost you. The examiner is not evaluating whether you keep up with traffic flow; they are evaluating whether your gap is safe.
Instructor's Tip
Practise the two-second check consciously on every journey. Narrate it internally: 'vehicle passes lamp post — one, two — I pass lamp post. Good.' Over time, the correct gap starts to feel natural. If you're consistently arriving at the fixed point in less than two seconds, gradually increase your following distance until you consistently pass on 'two' or later.
Frequently Asked Questions
- If cars keep cutting into my gap, should I close up?
- No. If someone cuts into your space, simply drop back to restore the two-second gap. The two-second rule is about your safety, not about preventing queue-jumping.
- Does the two-second rule apply in slow urban traffic?
- At low speeds, two seconds represents a short distance — but the principle holds. Maintain a gap you could comfortably stop in. 'Tyres and tarmac' is a good guide when fully stopped.
- What if maintaining a safe gap means I miss a junction I need?
- If you cannot enter a junction safely while maintaining a correct following distance, wait for the next safe opportunity. Driving test examiners do not penalise safe decisions, including missing a turn.