Thank for your help but This does not help me.
I have found a solution, i think.
In function.php, I have 2 functions (my_pre_save_post_trajets() and my_pre_save_post_vehicules()).
And finally, I add add_filter(‘acf/pre_save_post’,’my_pre_save_post_trajets’) and add_filter(‘acf/pre_save_post’,’my_pre_save_post_vehicules’) in corresponding template page.