- 고속버스 (고속 = high speed) Express buses running between major cities via fastest highways.

- 시내버스 (시내 = intra-city) Traditional passenger buses running long routes within the city.

- 마을버서 (마을 = village, neighborhood).  (Smaller and slower) shuttle buses running short distances between subway/시내버스

 station and its surrounding neighborhoods.

Because the subway (지하철) and 시내버스 lines cannot reach every little part of a large city, residents living farther from the stations might have to walk 30 minutes to access them.  마을버스 fills this gap by shuttling between the major subway or bus stations and important locations in the surrounding residential areas.  It's like a small satellite system around each major station which is like a hub. This way, most people have access to public transportation within five to ten minute distance.