You're driving in a built-up area between 11.30 pm and 7.00 am. For what reason can you sound the vehicle's horn? You're driving in a built-up area between 11.30 pm and 7.00 am. For what reason can you sound the vehicle's horn?

• Possible answers:

   
• A. To greet a friend
• B. To get another driver to move out of your way
• C. To let another road user know you're giving way
• D. To warn another road user who poses a danger