Understanding Seoul’s Bus System

There are main colored buses in Seoul:
Blue-travel on major roads for long distances
Green-travel shorter distances and through subway transfer points
Red-express travel from Seoul to suburban areas
Yellow-travel within a district with in Seoul

You can use cash, Korean cards or T-money cards to pay for the fares (for adults):
Blue-cash 1150 won/card 1050
Green- cash 1150 won/card 1050
Red- cash 1950 won/card 1850
Yellow - cash 950 won/card 850

by seoul korea.