
| Bus Number | Blue Bus |
|---|---|
| 140 | This type of buses operate at higher speeds and access the median bus lane connecting suburban aeas to downtown Seoul. The city goverment is partly in charge of its operation. The city has taken full consideration to introduce 3kinds of buses belonging to the Blue Bus category : bendable bus, CNG (compreassed natural gas) bus with a lower platform, and reguler large-sized CNG bus. The blue color represents Seoul's skyline and Hangang(River) to symbolize security and freedom. |
| 405 | |
| 407 | |
| 408 | |
| 421 | |
| 440 | |
| 441 | |
| 462 | |
| 470 | |
| 471 |

| Bus Number | Green Bus |
|---|---|
| 4432 | Green bus is flexibly operated by private bus companies, to connect major subwat stations or bus terminals in downtown Seoul. Green stands for the mountains surrounding the city. |

| Bus Number | Red Bus |
|---|---|
| 9404 | The red buses are express buses designed specially for those commuting between downtown Seoul and the metropolitan area. The color red exudes energy of speed. |
| 9408 | |
| 9409 | |
| 9503 |
