What is the primary function of the vehicle's turn signals?

The primary function of vehicle turn signals is to indicate your intent to turn or change lanes. This is a crucial safety feature that allows drivers to communicate their actions to others on the road. By using turn signals, you provide a visual cue to neighboring motorists and pedestrians, letting them know your planned maneuver. This ability to signal intentions helps prevent accidents by reducing uncertainty among road users.

Other choices focus on different functions that do not align with the main purpose of turn signals. For instance, signaling an emergency typically involves hazard lights rather than turn signals. Warnings about upcoming traffic signals are not the role of turn signals; instead, they are there to inform other drivers specifically about turning or lane changes. Showing your speed is also not within the scope of turn signals, as speed determination relies on speedometers and other indicators, not visual signals to other road users.