What does this traffic sign indicate?

The traffic sign in the image indicates the presence of traffic lights ahead. This warning sign informs drivers that they need to prepare for having to stop or proceed, depending on the traffic light signals.

In Germany, it is essential to obey the signals displayed by traffic lights. A red light means stop, yellow signals caution and prepare to stop, and green indicates that it is safe to proceed. This sign serves to alert drivers in advance so they can adjust their speed and approach safely. Understanding this sign is crucial for maintaining safety and optimal traffic flow.