Budapest–Szolnok–Debrecen–Nyíregyháza–Záhony railway

It is 335 kilometres (208 mi) in length and is a double-track main line with 25 kV/50 Hz electrification.

The Szolnok - Záhony line has become known for the so-called Fekete vonat (black train) which brings labourers to the capital and has been the scene of fights.

[1] The initial 98-km segment between Pest and Szolnok was built by the Magyar Középponti Vasút (Central Hungarian Railway) and opened on 1 September 1847.

[2][3] Construction was interrupted by the 1848-49 war of independence and was resumed by the newly formed Tiszavidéki Vasút (Theiss Railway).

[2] Since January 1855, the ownership and operations-right of the section Budapest–Szolnok had been obtained by the Imperial Royal Privileged Austrian State Railway Company (StEG) in the association with constructing the section Szeged–Temesvár.