Sometimes LP does like this(Blink headlights,Continuous twin honking) to alert people crossing the track.ЁЯШВThis is my personal experience.Once I was standing close to track to capture Hirakud Express in my camera and LP continuously made the headlights blink besides honking.When it approached close to me I realised that the train is moving much faster that what I expected and the gradient cheated me by giving misconception that train is approaching slowly