What do you do when you see this traffic sign on an autobahn?

This traffic sign indicates a traffic jam ahead. It serves as a warning for drivers to increase their alertness because they may encounter slowing or stopped vehicles.

Correct actions in response to this sign are:

1. Increase your alertness and maintain a safe distance from the vehicle in front. This helps in reacting appropriately to sudden stops.
2. If a traffic jam occurs, you should brake and switch on your hazard warning lights. This informs other drivers of the situation, enhancing safety.

It's crucial not to attempt moving onto the hard shoulder in the case of a traffic jam, as this is generally prohibited and can create additional hazards. Following these guidelines helps maintain order and safety on the road.