The traffic sign you mentioned is known as the "Redirection Arrow (Route Recommendation) to the Left." This sign is used to indicate that drivers should divert to the left as part of a recommended route, often due to road works or other obstacles on the road ahead.

In practical terms, when you see this sign, it’s a directive to change your path to the left to ensure safe passage or comply with temporary traffic regulations. It’s essential to follow this sign to avoid any possible hazards or obstructions on the current route. Always check for other vehicles and pedestrians before making the turn.

If you have any further questions about driving rules or other traffic signs, feel free to ask!