The neighborhood is well served by the New York City Subway. Several lines have stops in Park Slope. The IND Culver Line (F G trains) run along 9th Street, a main shopping street, stopping at Fourth Avenue, Seventh Avenue and 15th Street – Prospect Park/Prospect Park West. The IRT Eastern Parkway Line (2 3 4 5 trains) runs under Flatbush Avenue with an express stop at Atlantic Avenue – Barclays Center, and local stops at Bergen Street and Grand Army Plaza. The BMT Fourth Avenue Line (D N R trains) makes stops at Prospect Avenue, Ninth Street, Union Street and Atlantic Avenue – Barclays Center. The BMT Brighton Line (B Q trains) also passes through the neighborhood under Flatbush Avenue making stops at Atlantic Avenue – Barclays Center and Seventh Avenue. All three stations at Atlantic Avenue are connected with passageways to allow free transfers between the numerous subway services there.