What does this traffic sign indicate?

This traffic sign indicates a cul-de-sac, also known as a dead-end street. It means the road you are entering does not have an exit at the far end, so you will have to turn around to leave.

In German traffic rules, this sign is important because it warns drivers that continuing straight will not lead to a through road, which can prevent unnecessary driving into a road where you cannot continue onward. It helps with route planning and prevents confusion or getting stuck.

The sign itself is blue with a white "T" shape and a red horizontal bar on top, symbolizing that the street ends ahead. This differs from signs indicating underpasses or road closures, which use different symbols and colors.

Knowing this sign helps you anticipate the end of the road and adjust your driving accordingly.