During daytime, where is it permitted to use headlights to signal the intention to pass?

The use of headlights to signal an intention to pass during daytime is permitted outside city limits. This practice is mainly established to enhance visibility and communication between drivers, especially on rural roads or highways where there may be less traffic and increased speed.

Outside city limits, where roads may be less illuminated and visibility can be more challenging, using headlights effectively informs other drivers of your actions. This is important for safety, as it helps ensure that both the driver attempting to pass and the driver being passed are aware of the maneuver being made.

In contrast, within city limits, the density of traffic and the presence of streetlights reduce the necessity for such signaling, as other vehicles and pedestrians are more likely to be aware of their environment. On highways, while it may seem logical to use headlights, the specific designation of being "outside city limits" allows for broader applicability, as highways can also be present in rural areas. Residential areas have their own set of considerations, often prioritizing neighborhood safety and not typically requiring or allowing overt signaling for passing.