The sign "Direction indication by arrows 1000-20" is used to indicate the direction in which drivers should proceed. It typically features multiple arrows pointing in different directions and is placed where a road may split or where multiple turning options are available.

In German traffic rules, this sign helps drivers understand their options at an intersection or junction. Each arrow corresponds to a specific lane or road direction that vehicles may take. For instance, if the left arrow points to the left lane, drivers in that lane must turn left, while those following the straight arrow should continue straight ahead.

It's important for drivers to carefully observe this sign and choose the appropriate lane based on their intended direction, ensuring a safe and orderly flow of traffic. Always follow the direction indicated by the arrows to avoid confusion and potential accidents.

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