How does a puffin crossing operate? How does a puffin crossing operate?

• Possible answers:

   
• A. A sensor holds the lights on amber for traffic while pedestrians are still crossing
• B. A sensor holds the lights on red for traffic while pedestrians are still crossing
• C. A sensor holds the lights on flashing amber for traffic while pedestrians are still crossing
• D. A sensor holds the lights on green for traffic while pedestrians are still crossing