Train services were affected badly on Wednesday due to dense fog condition 
While Hirakud Express arrived 20 hours behind the schedule, Awadh Assam Express reached capital 30 hours behind the scheduled arrival time.
Departure timings of four trains including Janata Express and Poorva Express were rescheduled because of fog, a senior Northern Railway official said.
The dense fog also resulted in cancelling Inter-City Express to Jalandhar.