The sign you mentioned is known as the "Announcement sign double lane (200m, yellow)." This sign indicates that in 200 meters, there will be a section of road with double lanes. The yellow background is used to warn drivers of upcoming changes in traffic conditions or road setup.

Drivers should be prepared to adapt their driving behavior, such as adjusting speeds or positioning their vehicle in anticipation of the double lanes. It's important to stay alert and follow any further indications that may follow this sign, as they could provide more specific information about lane usage or any restrictions that may apply.

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