Notes: 1. The left side of a line is the post-partition route, Whereas, the right side of the line is the pre-partition route as it stands today. 2. The Siliguri/New Jalpaiguri–Haldibari Line is common to both the old and new routes.
The 12343 / 12344 Sealdah-Haldibari-Sealdah Darjeeling Mail is one of the oldest running legendary trains in India which connects Kolkata With Haldibari via Barddhaman, Malda Town, New Jalpaiguri, and Jalpaiguri. This is a major train for Kolkata–Siliguri route. It is also the first train to run with AC electric loco WAP-7 in Sealdah to Haldibari stretch.[1]
From 1878, the railway route from Kolkata, then called Calcutta, to Siliguri was in two laps. The first lap was a 184.9 kilometres (114.9 mi) long journey along the Eastern Bengal State Railway from Calcutta Station (later renamed Sealdah) to Damookdeah Ghat on the southern bank of the Padma River. The passengers would then avail a ferry across the river. The second lap of the journey was a 363.1 kilometres (225.6 mi) metre-gauge line of the North Bengal Railway that linked Saraghat on the northern bank of the Padma to Siliguri.[2]
The Darjeeling Mail ran on this route in pre-partition days. Even after the partition of India it ran on this route for some years.[4][5]
Ferry across Ganges (Post-partition)
With the partition of India in 1947, the major hurdle in connecting Kolkata and Siliguri was that there was no bridge across the Ganges in West Bengal or Bihar. A generally acceptable route to Siliguri was via Sahibganj loop to Rajmahal, then across the Ganges by ferry to Manihari Ghat on the other side, then to Kishanganj via Manihari, Katihar and Barsoi and finally through narrow gauge to Siliguri.[6] In 1949 Kishanganj–Siliguri section too was converted to metre gauge, thus making the entire route a uni-gauge one.[2]
Run via Farakka Barrage
In the early 1965s, when Farakka Barrage was being constructed, a more radical change was made. Indian Railways created a new broad-gauge rail link from Kolkata, and on a greenfield site south of Siliguri Town built an entirely new broad-gauge junction, New Jalpaiguri.[2]
In 2022, the train was extended till Haldibari station. However this extension was met with apprehension as it was thought that this extension will reduce the importance of the New Jalpaiguri station.