Final answer:
Turn signals should be used before any significant changes in a vehicle's movement to ensure the safety of other road users and pedestrians. The use of turn signals and traffic signals at intersections reduces accidents and provides safe crossing for pedestrians.
Step-by-step explanation:
You should use turn signals to indicate your intention with sufficient time to allow other drivers to see the signal. The correct answer is that you should signal before you move, whether turning or changing lanes, to ensure safety and clear communication with other drivers on the road.
It's essential to signal before you take any significant action that affects the traffic flow, such as stopping the vehicle or slowing down. For instance, when approaching a traffic signal, it's crucial for vehicles to adhere to the speed limit and use signals appropriately to avoid accidents and ensure both pedestrian safety and the safety of other drivers.
Models cause-and-effect scenarios highlight the importance of appropriate signaling and traffic lights. For example, before the installation of a traffic signal at a busy intersection, vehicles frequently sped through without regard for speed limits, endangering pedestrians crossing to and from a campus.
After the traffic signal installation, it regulates speed and provides safe crossing for pedestrians, resulting in fewer accidents and enhancing safety overall. Moreover, traffic signals have been shown to significantly decrease the rate of accidents, even those resulting in a loss of life, as data indicates a high frequency of accidents can occur at intersections lacking proper signaling.