Résumé : We present the two toolboxes of Scilab dedicated to the traffic assignment. The first one, called CiudadSim, is devoted to the single class single mode case. The second one, called MCiudadSim, is concerned with the multiclass multimode case. After recalling the notions of Wardrop equilibrium and stochastic assignments the toolboxes are introduced and the manuals --- describing completely all the functions --- are given.