Przedsiębiorstwo Komunikacji Samochodowej (commonly abbreviated PKS, can be translated as Car Communication Enterprise) is a major Polish enterprise dealing with public transport.
It was created as a state enterprise in 1945 in post-war communist Poland as Państwowa Komunikacja Samochodowa (State Car Communication). In 1992 it was renamed to its current name. Until recently it had a monopoly on suburban bus transport in Poland. Recently it has been broken up, with many new companies being privatized.
PKS buses involving in two major crashes in Poland. The first in 1978 - 30 people died, when two buses plunged 18m into Żywieckie lake from a bridge. In the other in 1994 - an overcrowded bus collided with a tree and 32 people died in the worst road disaster in the country's history.