Final answer:
Traffic signals at designated left turn lanes are crucial as they regulate when to turn left, ensure the safety of pedestrians, and reduce accidents by enforcing a stop when it turns yellow, awaiting the next green light.
Step-by-step explanation:
The discussion centers on why traffic signals are of paramount importance at certain intersections, particularly those with a designated left turn lane. Traffic signals serve multiple functions, they regulate the flow of traffic, ensuring that drivers know precisely when to turn left and governing the movement of vehicles in the straight-through and right-turn lanes which will be stopped by a red light on a different set of lights. Once the light has turned yellow, you must stop, which increases safety by reducing the chances of speeding and accidents. Additionally, traffic signals greatly improve pedestrian safety, allowing them to cross at designated times without the need to navigate through moving traffic. Furthermore, the imperative to install traffic signals can be emphasized by the increase in accidents, sometimes fatal, illustrating a critical need for regulated traffic flow to ensure the well-being of all road users.