The sign is called "Narrow Road."

This traffic sign indicates that you are approaching a section of road that becomes narrower ahead. It informs drivers to be cautious when navigating through this area as there might not be enough space for two vehicles to pass simultaneously. You should reduce your speed and be prepared to yield to oncoming traffic if necessary. It is particularly important to stay alert for pedestrians and cyclists in these areas, as they may also be sharing the road.

If you have any more questions regarding this sign or other traffic rules, feel free to ask!