If you look at this spiffy side-by-side graphic I've tossed together, showing the current freeway ramps and flyovers at 11th Street versus what the EIS depicts, you'll see that the bulk of the SE Freeway's lanes will turn toward the bridges at 11th Street, instead of just two smaller flyovers that currently exist. This is because the many lanes that now run from the freeway under 11th Street and over to Pennsylvania Avenue at Barney Circle will be taken out of the SE Freeway flow altogether. Instead, drivers on the SE Freeeway wishing to get to Barney Circle (and vice versa) will access the freeway and the new "Southeast Freeway Boulevard" (kind of a "Virginia Avenue Extended") via ramps at 11th Street, which appear to be able to be carved out of the existing smaller flyovers west of 11th. (And so the two flyovers coming from east of 11th to the sunken Pennsylvania Avenue access could be demolished altogether.) This means that the area north of M along 11th Street will be much more of a street grid rather than a series of flyovers and tunnels. Eventually.

And, for Navy Yard workers who use the 11th Street Bridges, note that you would no longer get to take that little turn onto N Street as you come off the bridge; you would arrive at M Street, turn right, turn right again on a newly two-way 12th Street, and then turn right at N. For other people, you'd be able to either turn left at M once you exit the upstream span of the bridge, or continue north on a new street and access the new Southeast Freeway Boulevard to continue either to Pennsylvania Avenue or 11th Street closer to I.

But it's really hard to clearly explain it all, so put on your concentration caps and spend some time comparing the befores-and-afters to see for yourself.