The Dominican Republic has a rapid transit system in Santo Domingo, the country's capital. It is the most extensive metro system in the insular Caribbean and Central American region by length and number of stations. The Santo Domingo Metro is part of a major "National Master Plan" to improve transportation in Santo Domingo as well as the rest of the nation. The first line was planned to relieve traffic congestion in the Máximo Gómez and Hermanas Mirabal Avenue. The second line, which opened in April 2013, is meant to relieve the congestion along the Duarte-Kennedy-Centenario Corridor in the city from west to east. The current length of the Metro, with the sections of the two lines open , is . Before the opening of the second line, 30,856,515 passengers rode the Santo Domingo Metro in 2012. With both lines opened, ridership increased to 61,270,054 passengers in 2014.