The Draft Environmental Impact Statement for Alexandria's Potomac Yard Metro Station came out yesterday and for cyclists, the main relevant concern is about the location, number and completion date of various proposed bicycle-pedestrian bridges. [There's also much written about how the designs impact the views from the Mount Vernon Trail, but the impact is so small - and the presence of the road so large - that I have a hard time thinking any cyclists really care that much].
There are four build alternatives, none of which will impact current plans to build a multi-use trail from Braddock Road to Four Mile Run (which is to be completed next year) or a bicycle and pedestrian bridge over the existing CSXT Railroad and Metrorail Line between Potomac Greens and North and/or South Potomac Yard neighborhoods; but on the latter the placement of that bridge and when it gets built is impacted.
In Build Alternatives A and B, the bike/ped bridge will be integrated into the design of the Metro station itself. In Build Alternatives B-CSX and D, the bike/ped bridge would be developed as a separate project by the City of Alexandria.
Build A would include two bridges, a bike/ped bridge outside of the Metro gates - with 24-hour access - on the north side and a pedestrian-only bridge within the Metro gates on the south side. The bike/ped bridge would connect East Glebe Road to Potomac Greens Drive.
Build B would shift the station north and with it the bike/ped bridge. It would also include two bridges, a bike/ped bridge outside of the Metro gates - with 24-hour access - on the south side this time and a second bridge to the Metro station on the north side. The bike/ped bridge would connect from just north of East Glebe Road to Carpenter Road.
As noted, there is no bike/ped bridge included in the B-CSX option, which relocates the CSX tracks to the west of the existing line to allow the station to avoid GWMP property and the Greens Scenic Area easement.
The B-CSX Design Option station would not include a bicycle and pedestrian bridge connecting the Potomac Greens and Potomac Yard neighborhoods. Direct bicycle and pedestrian access from Potomac Greens to the Metrorail station along the east side of the Metrorail tracks is not possible without a permanent encroachment into the Greens Scenic Area easement and wetlands. Thus, a separate pedestrian bridge over the CSXT right-of-way and existing Metrorail tracks providing 24-hour pedestrian/bicycle access between the Potomac Yard and the Potomac Greens neighborhoods would be constructed as part of a separate City of Alexandria project.
Build Alternative D would move the Metro tracks to the west of the CSX tracks by elevating it.
One pedestrian bridge over the CSXT right-of-way would be constructed simultaneously as a separate project by the City of Alexandria, providing 24-hour pedestrian/bicycle access between Potomac Yard and the Potomac Greens neighborhood.
Build D would allow for a bike/ped bridge outside of the Metro gates - with 24-hour access - on the south side of the station, passing under the tracks. It could connect to Potomac Greeens at two locations
I personally prefer Alternative D - from the standpoint of bike access - because it is the more direct route, with two connection options on the east side. Although, as the picture notes, this is not the final design.