The Border Roads Organisation ( BRO ) , a tri-service organisation of the Defence Ministry specialising in road and bridge construction in difficult terrains , had initially estimated that the tunnel would be ready for vehicle flow by 2015 .
The Border Roads Organisation ( BRO ) , a tri-service organisation of the Defence Ministry specialising in road and bridge construction in difficult terrains , is overall in - charge of the project . 
 It had initially estimated that the tunnel would be ready for vehicle flow by 2015 .