Practical information for the driver: this means the traffic sign with the red dot

There are more than 20 million traffic signs on German roads and motorways, which are intended to ensure safety and order.

With the abundance of different symbols, however, road users are repeatedly confronted with traffic signs that they do not know or misinterpret.

These include, for example, a red dot, which is mainly found on signs on busy country roads and motorways. But what is behind it?