Obwodnica trójmiejska or Obwodnica Trójmiasta (Tricity Beltway) is part of S6 express road that bypasses the cities of Gdynia, Sopot and Gdańsk. The beltway runs north to south from Gdynia to Pruszcz Gdański and is 38.6 km (24.0 mi) long. Together with the Słupsk bypass, it forms a part of the S6 expressway which will eventually run from Szczecin to Gdańsk. It is also part of the european route E28.