Expressway S8 or express road S8, officially named The Route of the Heroes of the Battle of Warsaw 1920 (pl. droga ekspresowa S8, Trasa Bohaterów Bitwy Warszawskiej 1920 r.) is a Polish highway which connects Wrocław via Łódź and Warsaw to Białystok. The whole road is 554 km (344 mi) long. Its fragment forming the bypass of Wrocław (22.7 km) is constructed in motorway standard and marked as A8.
The road was constructed between 2008 and 2019 (short fragments serving as town bypasses had been constructed earlier). The construction was co-funded by the European Union.