Flashing yellow traffic light
In some countries, a flashing yellow light means that intersection must be treated as non-signalized, other road signs such as “yield” or “major road” must be obeyed if present. The single flashing amber signal is used in the UK, Ireland and Australia at Pelican crossings. It is used in Serbia and the United States to mark places where greater attention is needed (dangerous crossings, sharp curves etc.). In Canada, a flashing amber light means “drive with caution” and is frequently combined with a flashing red light (meaning “stop”) at four-way intersections. In many South East Asian countries (e.g. Thailand) and European countries, a flashing amber light indicates a driver may proceed cautiously across a junction where signals operate only at busy periods.