The traffic sign you are referring to is known as the "Exit sign on other roads outside the motorway," which is indicated in white with specific destinations according to sign 432.

This sign is used to inform drivers about exits available on roads that are not part of the motorway system. It typically includes the names of destinations or features accessible via the upcoming exit. The intention is to guide drivers towards those locations, allowing for smoother navigation and reducing confusion as they approach junctions or intersections.

When you see this sign, it indicates that you should prepare to take an upcoming exit if your intended destination is listed. You should start to plan your lane changes early and be mindful of surrounding traffic to safely exit the road.

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