
Because the Crosstown Line was built by the city and the new (unbuilt) Williamsburg lines were meant to replace the elevated Jamaica Line (J/M/Z) no direct transfer was ever established even though the demand remains.

It would have revolutionized travel for anyone living in Williamsburg and Bed Stuy where riders today only have the L train at Metropolitan-Lorimer as a transfer to reach Manhattan (overlooking the much further out Court Sq in Long Island City or Hoyt-Schermerhorn in downtown Brooklyn).

The Broadway station on the Crosstown Line was once planned to be a critical hub where the aforementioned unbuilt East River tunnels would meet and fan out into Brooklyn and Queens. G Train transfer points No transfer at J/M/ZThere is a cheaper alternative and one which the MTA hasn’t seemed too keen on in the past which is to build a physical connection between the G train and the elevated J/M/Z. So while long term a new tunnel will be needed it won’t really help us now. A new tunnel takes time to plan and the MTA ballparked the cost around $4.5b (which given the length and new stations seems to line up with current 2nd Ave Subway costs). The same thing is going on across town between New York and New Jersey with Amtrak’s North River Tunnel to Penn Station. I don’t want to sound hypocritical since this basic idea is the basis for quite a number of futureNYCSubway posts on this very site but the reality is that the Federal government is willing to foot the bill for restoration and clean up, not a brand new project. The L Train Coalition was recently quoted in a town hall meeting as asking why the MTA does not consider building a new tunnel first and repairing the Canarsie Tubes once the new tunnel is open. While some have pointed out that there were in fact two other tunnels planned between Manhattan and Williamsburg it doesn’t really help anything today. The MTA had more flexibility when it closed down other tunnels (the R was shut down for good for 14 months but due to redundancies the impact was minimal) but they left the L for last because they knew they had no good options. The MTA had the difficult job of having to rebuild the tunnels lest the intense corrosion from salt water eat away at everything metal and cripple the subway further.

Mother nature has a way of periodically reminding us that she is, ultimately, in charge and in 2012 Hurricane Sandy battered the city flooding all river tunnels south of 53rd St. After a decade of unprecedented growth the L train went from a backwater train running through a no-mans-land to becoming the pivotal artery feeding one of the hottest real estate markets in the nation. Much has been written and yelled about this project and I must fault the MTA for truly dropping the ball when it comes to handling the PR. The MTA is soon facing their own Gordian Knot: the shutdown and rehabilitation of the Canarsie Tubes, the tunnels that carry the L train between Manhattan and Brooklyn.
#J line train free
A new station at Union Ave/Broadway on the J/M/Z would allow a free physical transfer between the two lines. New transfer between E/M/G subway and 7 elevated trains at Court Sq. With the looming L train shutdown fixing this connection would go a long way in helping mitigate the disruptions. Due to a quirk in history there has never been a free transfer between the G train and J/M/Z trains.
