The Bratislava CARD is the integrated public transport system (IDS BK) ticket allowing unlimited travel in all zones in the city and region – trams, trolleybuses and buses (lines 1 – 199, night lines N21 – N99, lines X), red regional buses operated by Arriva Co. (lines 205 – 799) and trains (lines S8 – S70 and R20 – R70). In case of a ticket inspection please show the card along with your ID.