on the west side of I-25 and the I-225 Corridor is in the median of I-225. The grade separations of the junction are woven into the grade separations of the interchange between the two highways. New York, New York On the New York City Subway there is an above-ground example at Hammel's Wye on the IND Rockaway Line, as well as numerous below-ground examples across the network Connecting Metro-North Railroad's New Haven Line and Harlem Line, near Wakefield station in the Bronx Philadelphia, Pennsylvania Amtrak's Zoo Junction, where the Northeast Corridor meets the Keystone Corridor and sorts into 30th Street Station's lower and upper level platforms. Also known as Zoo Interlocking, the name comes from the Philadelphia Zoo, which is located in the crescent shaped pocket between the junction and the river. On SEPTA's Cynwyd Line, diverging from the Keystone Corridor west of 52nd Street. On SEPTA Airport Line, diverging from the Northeast Corridor south of Penn Medicine On SEPTA's subway–surface trolley lines, where the Route 10 diverges from Routes 11/13/34/36 west of 33rd Street. On SEPTA's Broad Street subway, where Broad-Ridge Spur trains diverge at Fairmount. There are also provisions for flying junctions north of Erie for the Roosevelt Boulevard Subway, and north of Olney for an extension on North Broad Street; both are maintained as layup tracks. San Francisco Bay Area, California The Oakland Wye, where all of Bay Area Rapid Transit's mainline operations converge near downtown Oakland On the Market Street subway in San Francisco where the J Church and N Judah lines join the main line of the subway. The subway portal is east of the intersection of Church Street and Duboce Avenue in the Duboce Triangle neighborhood, immediately north of a Safeway supermarket and south of the San Francisco branch of the United States Mint. Washington, District of Columbia All main-line connections on the Washington Metro – adjacent to the Pepco power plant on Benning Road (near the Stadium-Armory station) is a large three-track structure with a turnback pocket where the Blue, Silver and Orange Lines meet. This would have been part of the Oklahoma Avenue station, had it been built. South of the King Street station in Alexandria is a series of tunnels where the Blue and Yellow Lines meet. There are also flying junctions near three underground rail stations: Rosslyn (Blue, Silver, and Orange Lines), L'Enfant Plaza (Green and Yellow lines), and the