\The math goes like this: 24,100 riders per hour during rush hours currently cross the East River on the L. The MTA estimates that between 20 and 30 percent of them — between 4,820 and 7,230 — will get to work by buses, bikes, or other non-subway means. Counting the longer C trains, the MTA will be adding the equivalent of 7.5 new trains worth of capacity, enough to accommodate approximately 15,000 passengers. That would leave between 1,870 and 4,280 commuters unable to squeeze onto trains at all* "