translate English to French: The expansion of motor vehicle traffic led to the conclusion in Paris, on 24 April 1926, of two new conventions which were intended to amend and amplify the 1909 Convention: the International Convention relating to Road Traffic and the International Convention relating to Motor Traffic.
L'essor pris par l'automobile amena à conclure à Paris, le 24 avril 1926, pour modifier et compléter la "Convention de 1909, deux conventions nouvelles: la "Convention internationale relative à la circulation routière" et la "Convention internationale relative à la circulation automobile".