The low visibility has led to the cancellation of 21 trains.
Moreover, 13 trains have been rescheduled and 59 are arriving late.
Earlier on Tuesday, the Indian Railways has decided to extend the services of few weekly special trains, in order to clear the holiday rush of passengers and the inconvenience caused due to dense fog in the national capital region.
The air quality in the national capital has been keeping under 'very poor' category as the fog has not been allowing the particulate matter to disperse.
The weather condition is likely to remain the same for the next few days. (ANI)