Which scenario requires a driver to signal?

Signaling is an essential part of safe driving as it communicates a driver's intentions to other road users. When changing lanes or pulling into traffic, a driver is required to signal to ensure that other drivers, cyclists, and pedestrians are aware of their movements. This helps prevent accidents and improves the overall flow of traffic.

The importance of signaling when making a lane change or entering traffic cannot be understated; it allows others to adjust their speed or position accordingly. For instance, if a driver needs to merge into a busy lane but does not signal their intentions, they may inadvertently create a situation where other drivers are caught off guard, increasing the risk of a collision.

While signaling is indeed required in multiple scenarios, the act of changing lanes or pulling into traffic is particularly critical, as it directly involves interaction with other moving vehicles. In contrast, the other choices focus on specific situations (such as only entering or leaving the freeway or parking) that, while they do require signaling, do not encompass the broader necessity for signaling that occurs regularly in everyday driving.