thumb|right|An Indonesian intercity bus, P.O. Rosalia Indah Scania K360IB bus travelling across Java, connecting Surabaya, Solo and Jakarta The intercity bus service has become the major provider of land transportation service connecting Indonesian cities, either within an island or inter-island connected through ferry crossings. The intercity bus operator companies are called P.O. ( in Indonesian) with several major companies operating mainly in Java and Sumatra. The longest intercity bus service in Indonesia is a route operated by P.O. Antar Lintas Sumatera (ALS) connecting Medan in North Sumatra and Jember in East Java. It is a week long bus travel covering a distance of 2,920 kilometers.
thumb|right|An Indonesian intercity bus, P.O. Rosalia Indah Scania K360IB bus travelling across Java, connecting Surabaya, Solo and Jakarta The intercity bus service has become the major provider of land transportation service connecting Indonesian cities, either within an island or inter-island connected through ferry crossings. The intercity bus operator companies are called P.O. ( in Indonesian) with several major companies operating mainly in Java and Sumatra. The longest intercity bus service in Indonesia is a route operated by P.O. Antar Lintas Sumatera (ALS) connecting Medan in North Sumatra and Jember in East Java. It is a week long bus travel covering a distance of 2,920 kilometers.