At least 49 trains were delayed, 14 rescheduled and one cancelled in Delhi on Saturday morning due to low visibility and operational reason.
The national capital has been experiencing dense smog for about a month.
The air pollution level has hit a new high, leaving its people grasping for breath,
Some parts of the region still continues to fall under very unhealthy category of the Air Quality Index.
The menace also forced authorities to take emergency measures such as banning construction activities and brick kilns in the National Capital Region.
The Central Pollution Control Board (CPCB) on Friday released the new air quality index (AQI) data of Delhi-NCR with prominent pollutants PM 2.5 and PM 10 in 'very poor' category.
In the national capital, the content of particulate matter, PM 2.5, in the air has been quite high, often crossing 500, while the safety limit is 50.
The PM 2.5 is responsible for respiratory problems and reduced visibility.
Earlier in the week, Delhi Chief Minister Arvind Kejriwal and his Haryana counterpart, Manohar Lal Khattar also promised to jointly address the toxic smog situation that has beset the northern India.