There was old narrow gauge line between Pahleja station and Sonepur station.
Ekma, Sonepur, Pahleja and Mashrakh and operating about a total of 200 trains,
Another line branches from here and joins Patna Sonepur line at Patliputra Junction railway station.
Sonepur is a Nagar Panchayat
and is noted for its Railways platform which is one of the largest in India.
The real estate land prices soared in Sonepur after the start of construction of Digha-Sonepur rail-cum-road bridge in 2002.
Former Prime Minister H. D. Deve Gowda laid the foundation stone for the construction of the railway bridge over Ganga at Sonepur.
In October 2016, Railways inaugurated a Happiness Junction at the Sonepur railway station,
with an objective to provide books and several other entertainment tools to passengers waiting for trains.
The station is about 58 m(190 ft) in height and has about 5 platforms, 21 tracks and 5 lines branching to Ballia, Siwan vaya Daudpur,
Ekma, Sonepur, Pahleja and Mashrakh and operating about a total of 200 trains,
which originates or arrives here.