Single fares on Nottingham's trams are to be scrapped for the Goose Fair.
Passengers will have to buy an adult day ticket at a price of £2.20 from 6 October, for four days.
Nottingham Express Transit (NET), which runs the trams, said the move was to ensure all travellers pay their way and do not dodge fares.
The firm estimates 5% of passengers do not buy tickets, and it wants to ensure every one of the thousands of passengers expected stumps up the cash.
A day ticket when booked in advance from the city centre sales centre is reduced by 20p to £2.
The Forest park and ride site will be closed from 1 October to 12 October - reopening when the fair has left.