We periodically take a look under the streets at the progress of the 2nd Avenue subway line, which is expected to be completed in December of 2016. Whereas in September the project was just a yawning cave, now it's...still a yawning cave, though workers at this point have excavated around 65 percent of the site. According to the Post, crews are wrapping up the main contract work at the 96th Street station, which included excavation, relocating gas and water pipes, and installing concrete walls "to hold the structure together." The MTA has also received nearly a third of the rails for the line, which are being housed in the 96th Street station.

The MTA has said that from the day it opens, the line will have a daily ridership of 200,000, alleviating congestion on the 4, 5 and 6 trains. In case you missed it, here's the plan behind the expansion, courtesy of the MTA:

Under the current plan, the project will be built in four phases. Phase One will include tunnels from 105th Street and Second Avenue to 63rd Street and Third Avenue, with new stations along Second Avenue at 96th, 86th and 72nd Streets and new entrances to the existing Lexington Av/63 Street Station at 63rd Street and Third Avenue.

The first construction contract involves the construction of new tunnels between 92nd and 63rd Streets, the excavation of the launch box for the tunnel boring (TBM) machine at just south of 92nd to 95th Streets, and access shafts at 69th and 72nd Streets. These shafts will be used for the subsequent construction of the 72nd Street station. Contract One is expected to take about 45 months to complete.

Phase One subway service, which is projected to carry over 200,000 weekday riders, will entail a reroute and extension of the existing Q Line service in Manhattan. Q Line service will operate along Second Avenue from 96th Street to 63rd Street, where it will divert west along the existing 63rd Street line, stopping at the Lexington Avenue/63rd Street Station, where riders will be able to transfer to the F Line line.

It will then continue west under Central Park on tracks that are currently not being used for passenger service and then head south, stopping at express stations along Seventh Avenue and Broadway before crossing the Manhattan Bridge to Brooklyn. Passengers traveling to Lower Manhattan on this route will be able to transfer for local service to destinations south of Canal Street. Alternate service will be provided to replace service to Astoria, Queens.