Przedsiębiorstwo Komunikacji Samochodowej (commonly abbreviated PKS, can be translated as Motor Transport Company) is a major Polish enterprise dealing with inter-city public transport using coaches.

Until 1989 it had a monopoly on suburban and interurban bus transport in Poland.

[1] PKS buses were involved in two major accidents in Poland.

The first one occurred in 1978, when two buses fell 18 m from a bridge into the Żywiec Lake, killing 30 people.

This remains the worst road disaster in Poland's history.