Who is required to indicate?

In the context of German traffic rules, when indicating is required, all relevant road users must signal their intentions to ensure safety and clarity on the road.

In this scenario with the blue truck and the red car, both are required to indicate. The driver of the blue truck needs to signal when changing lanes or making turns to inform others of their intentions. Likewise, the driver of the red car should also indicate any maneuvers, especially when they are moving into or crossing the intersection.

Not signaling can lead to confusion and accidents, as other drivers may be unaware of the vehicles' intentions. Therefore, all relevant parties must use indicators when necessary, adhering to traffic regulations that prioritize communication and safety among road users.