What about pierre??
What happens to pierre? - while shouting for taxies.. does he decide to let go of his family and let go of his son as well??
shareHe tries getting a taxi at the end more out of habit than necessity. His failure brings home to him the powerlessness he's experienced during the film.
What is he intending to do? Well, in the previous scene Anne seems to want to reconstruct something of their relationship. Pierre may well decide that he wants to do this too. However, at the moment you highlight, I think he's more absorbed in himself.