New Tech Promises Less Subway Crowding, If Albany Doesn’t Beggar the MTA
Last week’s news that NYC Transit is planning to boost L train service isn’t just good for residents of Williamsburg. It points to a new era of faster and more reliable service throughout the subway system as the new signal technology known as Communications Based Train Control (CBTC) begins to take hold.

Communications-Based Train Control can relieve crowding throughout the subway system, Albany permitting. Photo: ianqui/Flickr
As the Times and Second Avenue Sagas reported, L train riders will start benefiting from more frequent service next summer, when the MTA adds trains on the weekends, which have seen an 84 percent jump in ridership since 2005. But the major advance in service, which promises to relieve crowding on some of the most jam-packed rush-hour trains in the system, will come at the end of 2012, when the new CBTC signaling system is slated to be completed.
Like most transit improvements here, the implementation will be slow and will come with some service disruptions. But the short-term pains will be well worth this major upgrade to NYCT’s antiquated signal technology. Whereas the century-old system now in use relies on block signals with colored lights alongside the track to tell operators if they’re too close to the train ahead, CBTC uses radio signals to locate all of the trains on the line. With this information, on-board computers can calculate the distance between trains precisely and in real time, letting operators run trains closer together without compromising safety.
With more trains per hour, wait times will diminish and trains should be less crowded — allowing for increased ridership as the experience of riding the subway becomes more convenient and pleasant. Adding just one train per hour adds space to move another 2,640 people. That translates to fewer times waiting while a packed train goes by, and fewer elbows in your ear when you board.










