() turn compass north under the Van Wyck Expressway, with another station at Jamaica Avenue. Just north of Hillside Avenue, they meet the four tracks of the IND Queens Boulevard Line at a flying junction, with connections to both the local and express tracks. Jamaica Center–Parsons/Archer was not intended to be the lines' northern terminal, as there are spurs on both levels for possible future extensions. On the lower level, they continue one train length and end at bumper blocks. This was a planned extension toward Hollis. Where the lower level tracks end, there is a provision for a diamond crossover switch at the end of the tunnel (under 160th Street). On the upper level, the tracks curve south to run under 160th Street and stop at about Tuskegee Airmen Way (formerly South Road), also ending at bumper blocks. The plan was for this line to use the LIRR Atlantic Branch right-of-way and run to Springfield Boulevard or Rosedale. Where the upper level tracks stub end, there is a provision for a portal to go outside if the line going to Southeastern Queens is ever built. The tail tracks on both levels are currently used for storage. History Planning What is now the Archer Avenue subway was originally conceived as an extension of the IND Queens Boulevard Line under the IND Second System in the 1920s and 1930s. The original plans had a line diverging south of Van Wyck Boulevard station (now called Briarwood), running down what is now the Van Wyck Expressway to Rockaway Boulevard near modern John F. Kennedy International Airport. A bellmouth with two additional trackways was built to the east of the station to facilitate this extension, which was never constructed due to lack of funding. The current Archer Avenue plans emerged in the 1960s under the city and Metropolitan Transportation Authority (MTA)'s Program for Action. It was conceived as an expansion of Queens Boulevard service to a Southeast Queens Line along the right-of-way of the Long Island Rail Road (LIRR) Atlantic Branch towards Locust Manor, and as a replacement for the dilapidated eastern portions of the Jamaica Avenue elevated within the Jamaica business district which business owners and residents sought removal of; both would meet at the double-decked line under Archer Avenue. The two-track spur from the Queens Boulevard Line would use the original Van Wyck Boulevard bellmouths. Design work on the line began in