Using your headlights while driving in bright sunlight serves multiple important purposes. Even during the day, activating your headlights enhances your visibility, making you more noticeable to other drivers. This is especially crucial when the light is glaring, as it can create blind spots or obscured lines of sight, increasing the risk of accidents. Headlights can also illuminate road signs and hazards, aiding in safe navigation.
When considering hand signals, while they may be useful for communicating turns or stopping to other drivers, they do not improve your vehicle's visibility in bright sunlight. Hazard lights are typically reserved for indicating a stopped vehicle or a situation of danger, and emergency flares are used to alert others to an emergency situation, making them unsuitable for everyday driving conditions. Thus, using headlights is the most effective choice when driving in bright sunlight.