New Delhi, Dec 22 (PTI) A layer of dense fog enveloped the Indo-Gangetic plains including Delhi Thursday morning, affecting road and rail traffic.
A railway spokesperson said 20 trains were running late by 1:30 to 4:30 hours. Flight operations remained unaffected, an airport official said.
According to the India Meteorological Department (IMD) ‘very dense’ fog is when visibility is between 0 and 50 metres, 51 and 200 is ‘dense’, 201 and 500 ‘moderate’, and 501 and 1,000 ‘shallow’.
