If the traffic controller’s arms are extended to the sides or lowered, traffic of non-rail vehicles is permitted:

Explanation

When the controller's arms are extended to the sides or lowered, non-rail vehicles approaching from his left and right sides may go straight or turn right (a tram straight only). From his chest and back all traffic is prohibited, including right turns, and 'straight only' leaves out the right turn (Rules, point 16, subpoint 2).