Which of these situations requires the use of turn signals?

The situation that requires the use of turn signals includes both changing lanes and turning at intersections because signaling is essential for informing other drivers and pedestrians of your intentions on the road. This practice enhances safety and helps to avoid misunderstandings that could lead to accidents.

When changing lanes, using a turn signal alerts other motorists to your intention to move over, allowing them to adjust their speed or position accordingly. Similarly, signaling when turning at intersections indicates to others that you are about to make a turn, which helps in managing the flow of traffic and ensuring that everyone can navigate safely. Therefore, both actions necessitate the use of turn signals as a standard practice for safe driving.