What lights do puffin crossings have and what must you do at them?

Answer: D — Light order: green, amber, red, amber and red, green; detect if crossing is clear

Puffin crossings are specifically designed to enhance pedestrian safety by integrating traffic lights with push-button controls. The correct answer includes a sequence of lights: green, amber, red, amber and red, and then back to green. At a puffin crossing, the system is designed to detect when pedestrians are waiting to cross the road. Once a pedestrian presses the button, the signals change accordingly. While the red light is illuminated, vehicles must stop to allow pedestrians to cross safely. After the crossing is clear of pedestrians, and the lights change to green, vehicles can proceed. This answer highlights the unique feature of puffin crossings where they adjust based on the presence of pedestrians. The other options do not accurately capture the function and light sequence of puffin crossings, which play a critical role in managing traffic and ensuring pedestrian safety.