Final answer:
At a protected light, drivers should use caution even though they have the right-of-way. This ensures the safety of all road users and reflects the purpose of traffic signals to facilitate safe and orderly traffic flow.
Step-by-step explanation:
At an intersection, when a driver is turning at a protected light, they should always use caution. A protected light, typically a green arrow, indicates it is your turn to go, but it is still important to watch for any vehicles or pedestrians that may unexpectedly enter the intersection.
Despite the protection of a traffic signal, speeding through an intersection disregards the safety of everyone and increases the risk of accidents, as indicated by studies showing a higher rate of accidents in intersections without appropriate traffic signals.
Moreover, ensuring pedestrian safety by allowing them to cross at appropriate times is a critical purpose of traffic signals. Therefore, while one has the right-of-way during a protected turn, caution must always be exercised to maintain the safety of all road users, including pedestrians.