if(type == JUNCTION_WAIT)
view = new JunctionWaitTrackingView(model.getCurCycle(), junction);
else if(type == JUNCTION_ROADUSERS)
view = new NodeRoadusersTrackingView(model.getCurCycle(), junction);
if(view == null) throw new GLDException("Invalid tracker type!");
return genExtTracker(model, controller, view);
}