There could be multiple questions regarding travel cards of various states in various countries. For example in Washington DC it's the SmarTrip card, in New York City it is the MetroCard in the USA. In Australia, for Australian Capital Territory (ACT) it's the MyWay card and in New South Wales (NSW) it's the Opal card.
Therefore to group the questions on these travel cards related questions can we create 'travel-card' tag?