Saint Petersburg–Warsaw Railway is a 1,333 km (828 mi) long railway, built in the 19th century by the Russian Empire to connect Russia with Central Europe. At the time the entire railway was within the Russian Empire: Warsaw was under a Russian partition of Poland. Due to territorial changes, the line now lies within five countries and crosses the eastern border of the European Union three times. Therefore, no passenger trains follow the entire route. Passenger trains between Saint Petersburg and Warsaw used to travel through Brest instead and a new line called Rail Baltica is under development to improve the direct connection between Poland and Lithuania.

Białystok is the largest city in northeastern Poland and the capital of the Podlaskie Voivodeship. It is the tenth-largest city in Poland, second in terms of population density, and thirteenth in area.