A bus-lane sign shows no hours of operation. When is the bus lane in operation? A bus-lane sign shows no hours of operation. When is the bus lane in operation?

• Possible answers:

   
• A. The bus lane isn't in operation at all
• B. The bus lane is only in operation at peak times
• C. The bus lane is in operation 24 hours a day
• D. The bus lane is only in operation in daylight hours