Rule 109: Traffic light signals and traffic signs
Traffic light signals and traffic signs. You MUST obey all traffic light signals (see ‘Light signals controlling traffic’) and traffic signs giving orders, including temporary signals & signs (see ‘Traffic signs’). Make sure you know, understand and act on all other traffic and information signs and road markings (see ‘Traffic signs’, ‘Road markings’ and ‘Vehicle markings’).
Laws RTA 1988 sect 36 & TSRGD schedule 3 part 4, schedule 9 parts 7 and 8, schedule 14 parts 1 and 5, schedule 7 part 6, schedule 15 part 1
Why the capitals matter. The Highway Code writes a rule in capitals — MUST or MUST NOT — when it is backed by law, so breaking it is a criminal offence. The rules that do not use capitals are advice.
5 theory test questions on this rule
From the DVSA revision question bank. These are not the questions asked in the real theory test. Each one shows the answer, the explanation, and our own note on why every other option is not it.