In what conditions should you leave a two-second separation gap?

Explanation: In good, dry conditions, an alert driver who's driving a vehicle with tyres and brakes in good condition needs to keep a gap of at least two seconds from the car in front. When the road surface is wet, the gap needs to be increased to four seconds - and if it's icy, then the gap needs to increase to as much as 20 seconds.

Category: Band 1 road procedure

References: The Official DVSA Guide to Driving: Section 7, Highway Code: Rule 126