     
     public override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
-        
-        drawRoute()
         
         UIApplication.shared.isIdleTimerDisabled = true
         routeController.resume()

    /**
     The receiver’s delegate.
     */
    public var navigationDelegate: NavigationViewControllerDelegate?
    
    /**
     `voiceController` provides access to various speech synthesizer options.

    func navigationMapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) {
        guard let showsTraffic = showsTraffic else { return }
        mapView.showsTraffic = showsTraffic
        drawRoute()
    }
}

