What action is commanded by sign B7?

The action commanded by sign B7 is to turn left at the next road. This sign is a regulatory traffic sign, specifically indicating the direction that drivers must take at the next intersection. It's designed to ensure that drivers are aware of the required movement to prevent confusion and promote traffic flow.

In the context of road safety and regulations, adhering to this sign is crucial as it directs traffic in a manner that maintains order and reduces the likelihood of accidents at intersections where movements need to be coordinated. Understanding this signage is essential for all drivers, as failure to comply can lead to dangerous situations or traffic violations.