Expressway S86 - the section of national road 86 joining Katowice

Katowice

Katowice is a city in Silesia in southern Poland, on the Kłodnica and Rawa rivers . Katowice is located in the Silesian Highlands, about north of the Silesian Beskids and about southeast of the Sudetes Mountains.It is the central district of the Upper Silesian Metropolis, with a population of 2...

 (onramp Roździeńskiego) and Sosnowiec

Sosnowiec

Sosnowiec is a city in Zagłębie Dąbrowskie in southern Poland, near Katowice. It is one of the central districts of the Upper Silesian Metropolitan Union - a metropolis with a combined population of over two million people located in the Silesian Highlands, on the Brynica river .It is situated in...

 (onramp built Pogoń) built in 1978-1986 of length 6.8 km. This road is not a part of express road network plans. Being the main route of traffic between Zagłębie Dąbrowskie and Upper Silesia

Upper Silesia

Upper Silesia is the southeastern part of the historical and geographical region of Silesia. Since the 9th century, Upper Silesia has been part of Greater Moravia, the Duchy of Bohemia, the Piast Kingdom of Poland, again of the Lands of the Bohemian Crown and the Holy Roman Empire, as well as of...

 expressway S86 is a high traffic road, which is known for frequent traffic jams. According to General Traffic Measurement conducted by GDDKiA

GDDKIA

General Directorate for National Roads and Highways is the central authority of national administration set up to manage the national roads and implementation of the state budget in Poland...

in 2010 it carries heaviest traffic in Poland with average of 104339 vehicles daily.