In vehicle collision assessments, what role do turn signals play?

Turn signals are a critical aspect of vehicle safety, particularly during collision assessments, as they are designed specifically to indicate directional changes. When a driver intends to make a turn or lane change, using turn signals communicates this intention to other road users, including other drivers, pedestrians, and cyclists. This communication helps in preventing accidents by alerting others to the driver's planned movements and provides an opportunity for them to adjust their own actions accordingly.

By signaling a turn, the driver gives notice that they will be altering the vehicle's path, thereby allowing other motorists to anticipate this change. This becomes especially important in high-traffic scenarios where vehicles are closely navigating around one another. Proper use of turn signals is instrumental in maintaining road safety and reducing the risk of collisions that may arise from unexpected movement.

The other options do not accurately describe the primary function of turn signals. They do not indicate engine function, alert blind spot issues directly, or control vehicle speed; rather, their main purpose is focused on signaling directional changes to enhance communication and safety among road users.