The operations of two trains would be discontinued from December 20. These include Unchahar Express and Chandigarh-Lucknow train. This trains would be discontinued for around a month till the end of the foggy weather. Meanwhile,several trains were delayed today due to fog. The morning Kalka Shatabdi was late by 45 minutes while the train from Lucknow reached an hour late. Unchahar Express was delayed by 2 hours and 40 minutes.