MTA held a Silver Spring Station area meeting this evening at the Silver Spring Civic Center, and showed several concept drawings of the most recent design plans for the Purple Line and CCT at the Silver Spring transit station. A snapshot of one of the drawings has just been posted by Chris Gillis, of Councilmember George Leventhal’s staff, as a PLN twitter pic. As Chris indicated in the twitter comment, there is a lot going on there, but it looks like it will all work.
(5/31/2012 update: The MTA has posted its drawings and presentation at www.purplelinemd.com.)
The major change from past MTA renderings is that the Purple Line and the Trail are both higher than previously shown. MTA has raised the proposed Purple Line platform and tracks to be at a fourth level. The CCT would be on an areal structure passing through the station at the third level, while the MARC and Metro Red Line platforms would remain on the second level as they are now. Having the Purple Line at a higher elevation makes it possible to use vertical separation to manage potential conflicts between the trail users and the pedestrian traffic to the MARC and Purple Line platforms. The new arrangement puts the trail on a different level than the train platforms.
The trail would will hold straight and to a 12+ foot width through the station, but there would be a sharp turn at the south end of the station where the CCT would meet the MetBranch Trail. MTA and M-NCPPC planners are aware this is a problem and are trying to work out a more gradual curve alignment, but space is very constrained in that area as the MetBranch Trail and the new “Ripifant”
Street Road must both pass under the Purple Line tracks there where the tracks turn to the east. I will post more on this design in a few days, after the MTA has posted better images of their concept drawings on their website.