Does the plate under this sign indicate the layout of non-priority roads?

The D-1 "priority road" sign visible in the final stage of the recording belongs to the group of information signs. The T-6b plaque placed under it schematically shows the actual layout of the intersection, indicating the course of the priority road (thick line) and the layout of the subordinate roads (thin lines). According to the regulations, this plaque informs the driver of an unusual course of the priority road and the layout of its subordinate roads.