Białystok-Gdansk Diocese of the Autocephalous Polish Orthodox Church. Białystok is the largest concentration of Orthodox believers in Poland. In Białystok, the following Protestant churches exist: a Lutheran parish, two Pentecostal churches, Baptist church, a congregation of the Church of God in Christ and a Seventh Day Adventist church. Białystok is home to more than two thousand Muslims (mainly Tatars). There is an Islamic Centre, a House of Prayer, and various organisations. There is a magazine issued – "" ("Memory and persistence"). The city is the site of the Divine Mercy Sanctuary with the main relics of Michał Sopoćko. Transport The city is and has been for centuries, the main hub of transportation for the Podlaskie Voivodeship and the entire northeastern section of Poland. It is a major city on the European Union roadways (Via Baltica) and railways (Rail Baltica) to the Baltic Republics and Finland. It is also a main gateway of trade with Belarus due to its proximity to the border and its current and longstanding relationship with Grodno, Belarus. A traffic management system has been operating in Białystok since 2015. At 120 intersections, traffic lights are coordinated in such a way that cars and buses covered the route as quickly as possible. Special cameras record traffic, travel time. Drivers receive this information on 19 boards set among others at the intersections on Wasilkowska Street, Antoniuk-Fabryczny Street and Kleeberga Street. Railways Passenger trains connect from Suwałki, Grodno and Lithuania to Warsaw and the rest of the European passenger network. Passenger services are provided by two rail service providers, PKP Intercity that provides intercity passengers trains (express, intercity, eurocity, hotel and TLK) and Przewozy Regionalne that operates only regional passenger trains financed by the voivodeship. Passenger trains are mostly run using electrical multiple units (on electrified lines) or rail buses. Buses There is an extensive bus network that covers the entire city by three bus services, but no tram or subway exists. The three bus operators (KPKM, KPK and KZK) are owned by the city and each shares approximately a third of the lines and the bus fleet. Roads and highways The National Roads () running through Białystok: / : Budzisko (Lithuania–Poland border) – Białystok – Warsaw – Wrocław – Kudowa-Zdrój (Czech–Polish border) : Rzeszów – Lublin – Bielsk Podlaski – Białystok – Kuźnica (Belarus–Poland border) : Gołdap (Poland–Russia border)-Ełk-Białystok-Bobrowniki (Belarus–Poland border) The expressways () near Białystok: / : Białystok