Citizens will be able to ride the Metro for free in December, similar to the program that ran during the Book Fair in April, according to a report in Diario Libre. OPRET director Diandino Pena said the trial run would last two weeks and will be used as a way of educating the public about correct Metro use. Pena explained that train rides will eventually cost RD$20 or RD$25 and will be paid using a card system, similar to those in Boston and New York City. Pena did not give a precise date for the Metro opening.