The control of maritime traffic in the Strait of Gibraltar is conditioned by the regulation established in the United Nations Convention on the Law of the Sea, of 1982, in relation to straits used for international navigation where transit passage is applied. In this respect, it is necessary a cooperation between Spain and Morocco in order to designate sea lanes and establish a traffic separation scheme in that space. An analysis of this cooperation and of the last modifications of the Traffic Separation Scheme of the Strait of Gibraltar after the new Tangier-Med port being brought into service will be carried out in this paper.