The Nadwiślańska Railroad was designed as a structure of great significance in case of the outbreak of a war and therefore, its construction was prioritized. The railway was supposed to enable the transportation of supplies, ammunition, arms, and the army between the most important fortresses of the Kingdom of Poland: Warsaw, Modlin and Dęblin and the Russian fortresses in Volhynia: Łuck, Rovno and Dubno. Levelling of the ground, building embankments and laying the tracks began in the late 1874. The construction was completed in the record time of three years, on July 24, 1877. The main railway line, later called the Nadwiślańska Railway, was officially opened on August 17, 1877.