Why are you not allowed to overtake here?

In the given scenario, you are not allowed to overtake for two main reasons.

First, the side clearance to the cyclists is insufficient. According to German traffic regulations, when overtaking cyclists, you must maintain a safe distance to prevent endangering them. If there's not enough space, it's unsafe to pass.

Second, overtaking can endanger oncoming traffic. If oncoming vehicles are approaching, attempting to overtake can lead to serious accidents. Traffic rules emphasize the importance of ensuring the road is clear before maneuvering into oncoming lanes.

Thus, both reasons are critical to ensuring safety for all road users, especially vulnerable ones like cyclists. It's important to recognize these factors to make safe driving decisions.