As North India continues to reel under dense fog, the Indian Railways has installed a fog-safety device in the trains to prevent long delays in winters. The fog-safety device is placed in the driver's cabin and it alerts the driver of approaching signal on the track in the fog. Meanwhile, hundreds of passengers at several railway stations in north India have been left stranded after multiple trains have been cancelled, delayed and rescheduled for the last couple of days. Apart from this, the Indian Railways is also working towards upgrading Indian Railways infrastructure, especially computerisation of the signalling system.