You're travelling along a motorway. When are you allowed to overtake on the left? You're travelling along a motorway. When are you allowed to overtake on the left?

• Possible answers:

   
• A. When you can see well ahead that the hard shoulder is clear
• B. When the traffic in the right-hand lane is signalling right
• C. When you warn drivers behind by signalling left
• D. When in queues and traffic to your right is moving more slowly than you are