Why do they keep talking about HOT lanes across the Woodrow Wilson Bridge? Aren't there already express lanes there (albeit free)?
The Express Lane carriageways on the bridge were built wide enough to accommodate either a 3rd lane (at the time, presuming HOV) or rail transit. Design also accommodates potential future ramps between the bridge Express Lanes and I-295 (via the wider median at both spots) and from the Express Lanes to US 1 (note the gap in the median curb in the middle of the US 1 overpass).
Another point to note is that the Wilson Bridge's carriageways are not denominated on the signs as "Local" and "Express" but rather as "Local" and "Thru," the latter referring to what vdeane is referring to as the "express" lanes. I remember that back when the signs first went up, I was discussing it with sometimes-forum-participant mtantillo (though we weren't discussing it on this forum, which I don't think existed yet) and he mentioned that the FHWA was trying to transition away from the use of "express lanes" as a description for lanes that simply have fewer exits in favor of using that term for "managed lanes" such as HO/T lanes. One wrinkle is that the use of "Thru" precludes, as a practical matter, the use of the type of sign you sometimes see in New Jersey where it will have a banner saying "All Lanes Thru"—it's arguably contradictory or confusing to post one carriageway as "Thru" and then say "All Lanes Thru." (I see enough people swerving across the gore points at either end of the Wilson Bridge "Local"/"Thru" setup that I've thought VDOT and MDOT ought to figure out some way to indicate that thru traffic to Baltimore or Richmond can use either carriageway. I understand that violates the intent of segregating long-distance traffic, but as a practical matter, the swerving without looking may be a bigger problem.)
Further history.... Traditionally, the reversible HOV carriageway on I-95/I-395 in Northern Virginia (which is now HO/T) was referred to locally as "the express lanes" going back to the 1970s, and there were some signs that referred to them as such (mostly older signs, as over time VDOT started signing them as the "Restricted Lanes"). Back when the I-495 HO/T lanes first opened in late 2012, WTOP traffic reporter Bob Marbourg's main concern was "what are we calling these lanes?" He refused to call them "express lanes" because that name had long referred to the I-395 HOV system, so he took to calling them the "E-ZPass Lanes." I assume, but I don't really recall whether this is right, that he used the "Thru" terminology on the Wilson Bridge as well (I may be wrong about that, and he has now retired anyway).
So to some degree, it's a matter of semantics: The highway departments do not consider there to be "express lanes" across the Wilson Bridge because in their worldview, "express lanes" refer to managed lanes that do not exist there (yet).
I'm interested in learning how, if at all, they plan to reconfigure the two interchanges between Springfield and the existing "Local"/"Thru" split. The one at Van Dorn Street could use improvement due to the problems caused by criss-crossing traffic in a very short amount of space on the ramp exiting the Beltway.