Expressway S86 (Poland)

Expressway S86 (Polish: Droga ekspresowa S86, abbreviated as S86) – built from 1978 to 1986 section of national road 86 with a length of 5.9 kilometres (3.7 mi), connecting Katowice (Roździeńskiego Avenue, Murckowska Street and Bagienna Street junction) with Sosnowiec (Pogoń junction). In Katowice the road is a part of Walentego Roździeńskiego Avenue. The route has two carriageways, each with three lanes.

In 2010 it was the busiest national road in Poland, and continuously since 2015 it is the second busiest national road in Poland behind the bypass of Warsaw. At the same time it was the expressway with the highest number of traffic collisions and accidents in 2016.

Since 1999 it is maintained by General Directorate for National Roads and Highways (Polish: Generalna Dyrekcja Dróg Krajowych i Autostrad). On September 13, 2015, the government changed the ordinance of the motorways and expressways, officially including the S86 expressway in it, making it the shortest of all expressways in Poland. It is also one of the few expressways that at present time are not connected with the rest of the network of motorways and expressways.