You're driving an articulated lorry on a three-lane motorway. When can you drive in the right-hand lane?

Possible Answers:

a. When overtaking a slow-moving car in the middle lane

b. When the escort vehicle of an oversized load signals you to pass

c. If no speed limiter is fitted to your lorry

d. If your lorry is unladen

Think you know the answer to this theory test question?

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