Julien Salomon Universite Paris-Dauphine --------------------------------------------------- An intermediate state method for the time-parallelized solving of optimal control problems. Time parallelization is an efficient way to accelerate the numerical solving of optimality systems associated to control problems. In this talk, we present a general approach to parallelize optimal control solvers. This method is based on the introduction of intermediate states and enables to decompose the original optimality system into similar sub-systems. these ones can then be treated independently using standard solvers. We present a recent improving on the method that makes it fully efficient and discuss the role of the solver used in parallel. ---------------------------------------------------