Powered vehicles used by disabled people are small and can be hard to see. What must they display if they're travelling on a dual carriageway? Powered vehicles used by disabled people are small and can be hard to see. What must they display if they're travelling on a dual carriageway?

• Possible answers:

   
• A. Flashing red beacon
• B. Flashing green beacon
• C. Flashing blue beacon
• D. Flashing amber beacon