They just added the double decker freeway bridge, but you can't use it at all in any realistic way, since the game does not allow for stacking freeways, or stacking any roads when both are elevated. I don't see why this limitation should exist, as this is something that exists in real life.
Particularly the Bay Bridge in SF, where the two directions very gradually split off, or the portion of 280 nearby, or the old Alaskan Way Viaduct.
As it stands, the new bridge is sort of pointless, because you have to bulge it out so wide to get the freeways to connect, that you might as well have just used two bridges.