Travel Cards can be purchased for one, three or seven days. They are also available in monthly or yearly passes.
Both Travel Cards and Oyster Cards are good on bus, tram, light rail, underground and national rail services.
Oyster Cards are unique because they are topped up with money, up to 90 pounds at a time. Every time the card is used, the money is taken directly out of the bank.
When using the Oyster Card, you must remember to hit the yellow circle when entering and exiting a station.
Oyster Cards are purchased by what zone you need to travel to. Consult a map to see what areas of London you will be traveling to.