What is the best way for drivers to signal their intentions to others on the highway?

Using turning signals is the best way for drivers to communicate their intentions to others on the highway because they are specifically designed for this purpose. Turning signals, also known as turn indicators, are built into vehicles and provide a clear and standardized way for drivers to indicate their upcoming maneuvers, such as changing lanes or making turns. This visual cue helps ensure that other drivers and pedestrians understand a driver's intentions, thereby enhancing safety and reducing the likelihood of accidents.

While hand signals can be used, they are not as universally recognized and can be less visible, especially in inclement weather or at night. Flashing headlights might be misinterpreted and is not a widely accepted method for indicating turns or lane changes. Honking the horn typically indicates alertness or can be a warning but does not specifically convey the intention to turn or change lanes. Therefore, turning signals remain the most effective and reliable method for signaling intentions on the highway.