Great Britain Theory Test Coach
Speed and safety marginsQuestion 235 of 424

What is the smallest time gap to leave behind a vehicle on a high-speed road?

  1. Half a second
  2. One second
  3. Five seconds
  4. Two seconds
Show answer

Correct answer: Two seconds

On fast roads, leave at least a two-second gap.

Source: The Highway Code (Department for Transport, GOV.UK), General rules, techniques and advice for all drivers and riders (103 to 158), Rule 126

Practice speed and safety margins

Questions last reviewed: 18 October 2026