East Coast Buses links East Lothian towns such as Tranent, Haddington, North Berwick, Dunbar, Musselburgh and Penicuik to Edinburgh. Express routes like X4, X5, X6 and X7 run alongside local services including 106, 120 and night buses N107, N113, N124. Fares follow a zone system from A to H, with single tickets varying by zones travelled and day tickets available for city, country or combined areas.