What is the legal meaning of a headlamp flash?

In Irish driving law, a headlamp flash does not carry a legal meaning and is generally regarded as a non-verbal communication method between drivers. While drivers might use headlamp flashes to signal caution, alert others, or communicate intentions informally, these actions are not codified into the official rules of the road. Thus, they do not hold any legal implications in a driving context.

The other options suggest specific legal meanings or actions, but none are recognized within the framework of Irish traffic regulations. For instance, while flashing headlights may alert an oncoming vehicle, it does not legally constitute a warning. Similarly, it is not formally recognized as a signal to turn or a request to stop. Therefore, the absence of a legal meaning for headlamp flashes underscores their status as a casual form of communication rather than an official signal.