A fare is the fee paid for using public transport like buses, trains, taxis, and airplanes (airfare). Fare structure defines how much each passenger pays based on various factors. A linked trip is a complete journey from start to destination, even if it involves multiple transfers within the same system.
Around 1984, with fares in numerous major cities reaching $1.00, the first fareboxes capable of accepting dollar bills were introduced.
In 2006, new fareboxes were rolled out, equipped to handle cash, credit card, and smartcard transactions, and could dispense day passes and transfers to passengers.
In January 2023, the minimum penalty fare for traveling without a valid ticket on certain UK train lines, such as South Western Railway and Southern, rose to £20 or double the single fare.