According to traffic signals given by German police officers, what should vehicles do when arms are outstretched?

When a German police officer has their arms outstretched, it is a signal for vehicles to proceed if they are in line with the directions indicated by the officer's arms. This typically means that the traffic is being directed to continue moving in a specific manner, depending on how the officer's arms are positioned. The extended arms serve as a clear indication that the vehicles should follow the instructions given through the officer's body language, reflecting a controlled traffic situation.

Other options do not align with the established traffic control protocols. Continuing without stopping suggests that there is no need to heed the officer's signals, which would be incorrect given the responsibility of the officer to direct traffic. Waiting until further instructions could cause unnecessary delays if the officer is indicating that it is safe to proceed. Turning around would also be inappropriate under circumstances where movement in a specific direction is being permitted by the officer's guidance.