Lucknow Junction or Lucknow Jn NE (station code LJN), is unofficially considered a part of Charbagh railway stations. Colloquially, it is known as “Chhoti Line”, historically it harboured NE Railways’ Meter Gauge trains of erstwhile Izzatnagar Division, now falls under Lucknow Division of NE Railway. It is the terminus station for broad gauge trains of North Eastern Railway just like Howrah, Chennai Central and Mumbai CST. Therefore trains that enter this station have to reverse their direction to get out of the station even if the train’s destination is beyond Lucknow. It is a separate building, with a distinct identity with red sandstone, but almost a continuation of the main LKO (Northern Railways) station building.
Lucknow JN or LJN station has six platforms. The platform no.6 is accessible to the two wheelers, auto rikshaws and cars through an underpass cabway. This cabway is third cabway of Indian Railway after Howrah and Gorakhpur railway stations.
As of 13 January 2013, 44 express trains (or 22 pairs of trains) (none of which was Duronto, Rajdhani or Shatabdi) and 10 slow passenger trains (or 5 pairs of trains) started from, terminated at or passed through LJN station.
Earlier Lucknow junction was the terminus for metre gauge trains as almost all tracks of North Eastern Railway zone were metre gauge. With the conversion of most of these tracks to 1676 mm broad gauge under project Unigauge, the Lucknow junction does not have any metre gauge tracks. Now the terminus for the remaining metre gauge trains is Lucknow Aishbagh junction (station code ASH). Lucknow Aishbagh junction also has broad gauge tracks.