Script Limit speed not work

hybaby9

This is my code use to limit current vehicle speed but it does not work.
when I press "Get speed" in menu, the speed set to _listOfSpeed [listIndex] but still increase

    void chooseSpeedLimited()
    {
        UIMenu submenu = modMenuPool.AddSubMenu(mainMenu, "Choose Speed Limit");
        List<dynamic> _listOfSpeed = new List<dynamic>();
        dynamic[] speed = { 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250 };
        _listOfSpeed.AddRange(speed);
        UIMenuListItem _list = new UIMenuListItem("Speed: ", _listOfSpeed, 0);
        submenu.AddItem(_list);
        UIMenuItem getSpeed = new UIMenuItem("Get Speed");
        submenu.AddItem(getSpeed);
       Vehicle vehicle = Game.Player.Character.CurrentVehicle;
        submenu.OnItemSelect += (sender, item, index) =>
        {
            if(item==getSpeed)
            {
                
                int listIndex = _list.Index;
                
                vehicle.Speed = _listOfSpeed[listIndex];

                UI.ShowSubtitle("You have set limit your car");
            }
        };

    }