What does it mean when a man has his right hand up and left hand straight to the side?

When a man has his right hand raised and his left hand extended straight to the side, it indicates a specific signal to control traffic. This gesture is a recognized hand signal used by traffic controllers or police officers. The raised right hand typically suggests that vehicles approaching from the right must stop, while the extended left hand communicates a stop signal to vehicles coming from the left and behind.

In practical terms, this signal helps manage the flow of traffic at intersections or during roadwork. By allowing vehicles in the right lane to proceed while instructing others to stop, the signal ensures safety and order on the roadway. This explains why the answer emphasizes both the stopping requirement for vehicles in certain directions and the allowance for those in the right lane to move forward. It highlights the importance of understanding hand signals in driving situations for effective and safe navigation on the road.