private void Start()
    {
        TimeManager.Instance.OnStart();

        TrackPath.Instance.OnStart();

        carsHolder.OnStart();

        CompositionManager.Instance.OnStart();

        circuitSignals.OnStart();

        CouplerManager.Instance.OnStart();

        IndicationManager.Instance.OnStart();

        trainManager.OnStart();

        scenario.OnStart();

        UIManager.Instance.OnStart();
    }