A small line from Doddajala/ Trumpet to airport (Approx 6-8 KM) will serve the public. There can be railbus type of trains between Yelahanka and airport every half hour/ 45 minutes. Railways should execute this plan first and take further towards city. Not a costly option at all. When full fledged suburban system comes to effect, direct broad gauge connectivity is possible. You can bring train from anywhere to airport. Hope all concerned will think about this.