Expressway S8 or express road S8, officially named The Route of the Heroes of the Battle of Warsaw 1920 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.

Controlled-access highways in Poland are part of the national roads network and they are divided into motorways and expressways. Both types of highways feature grade-separated interchanges with all other roads, emergency lanes, feeder lanes, wildlife crossings and dedicated roadside rest areas. Motorways differ from expressways in their technical parameters like designated speed, permitted road curvature, lane widths or minimal distances between interchanges. Moreover, expressways might have single-carriageway sections in case of low traffic densities.