If the current in such a form moves first in one direction and then in the other, then it cancels out and is useless.
If a current moves in a specific way, it will accomplish nothing.
The square's grand, spacious effect is completed to the north by an arc de triomphe (dedicated to Louis XV) at the entrance to the long Place de la Carriyre ' also graced by 18th-century mansions and Jean Lamour's iron grilles.