Transit
A cheaper route to Metro core capacity, part 2: Virginia service patterns
One of the possibilities from Metro's core capacity study involves a short 9th Street tunnel from L'Enfant Plaza to Mount Vernon Square. That could be a cheaper way to add Metro capacity across the Potomac, the system's current bottleneck. It wouldn't add service to much-needed areas like the McMillan/AFRH area of DC, (though allowing that possibility in the future), but would address the impending overload of trains from Virginia once the Silver Line opens.
If we could run more trains over the 14th Street bridge, where would they go in Virginia? I can see two possibilities: convert the Arlington Cemetery segment to a shuttle train, or add connections to route the Silver Line over that segment as well as the Blue Line.
The shuttle train option
The Blue Line could simply run over the 14th Street Bridge with the Yellow Line to the new section. Silver and Orange share some tracks, Blue and Yellow others, with no other merges. To replace Blue at Arlington Cemetery, create a shuttle train
To avoid having the shuttle merge and unmerge with Orange/Silver at Rosslyn and Blue/Yellow at Pentagon, Metro would need to add a new platform at each station. Probably this could work with just a single platform inside the station, with a switch as close as possible. Trains would come in, unload and reload, then reverse out to make room for another train. Such an arragement would limit the capacity on the line, of course. Ideally, the platform(s) would go right across the platform from one of the two existing tracks in each station, minimizing the walk necessary to tranfer.
Pros: This requires fewer merges than in the current arrangement. Also, all merges happen outside of the highest ridership core areas, minimizing delays.
Cons: Commuting from Alexandria to "Orangeton," or southern Fairfax to Tysons, becomes more difficult, requiring either two transfers or a trip through DC.
The new connections option
Squalish got this one. In Metro's earlier core capacity study, they suggested adding some track connections for service flexibility. Those included a connection from Court House to the Arlington Cemetery tracks, and another one from the other end of those tracks to the 14th Street Bridge. If we built both of those, then the Silver Line could use the track in the opposite direction from the Blue Line, to get from Court House to L'Enfant Plaza.
Pros: There are lots of services going to lots of places. Riders along Rosslyn-Ballston or King St-Pentagon can choose either bridge. And except going to and from Yellow Line stations south of King Street, riders can go between any two Virginia stations entirely within Virginia with at most a single transfer.
Cons: Lines are merging and unmerging a lot, which creates operational challenges. Silver and Blue each have to share tracks with three other lines for part of their routes. If all lines are running at capacity, then at Pentagon (for example), a Silver Line train needs to reach the wye just as a Blue Line train reaches it from the other direction, or else one of the trains will have to wait, delaying all later trains.
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by Reid on Jun 30, 2009 10:15 am • link • report
This would solve the one major flaw in both of the proposals above (though I haven't seen your hybrid yet), in that a surprising number of Pentagon commuters live along the current Orange line corridor and also out toward Dulles. My solution provides them a one-seat ride to the Pentagon. It also continues to provide frequent cross-Arlington service (e.g., Crystal City to Rosslyn) that could be taken away if the "operational blue line split" (or, rather, rebranding of some trains to F-S as yellow) were to take place.
I think any proposal that narrowly excludes both Rosslyn and the Pentagon from any new connection is really missing the mark, as they're two of the largest employment centers inside the Beltway.
by Joey on Jun 30, 2009 10:21 am • link • report
by coneyraven on Jun 30, 2009 10:21 am • link • report
by Froggie on Jun 30, 2009 10:26 am • link • report
by Paul S on Jun 30, 2009 10:27 am • link • report
If a shuttle between Rosslyn and Pentagon is deemed the best option then it does need to be a train that uses the existing track. A shuttle bus just wouldn't cut it. To change a one transfer trip to a two transfers trip accompanied by an annoying mid trip Rosslyn escalator ride to street level would deter ridership.
by Paul S on Jun 30, 2009 10:35 am • link • report
by NikolasM on Jun 30, 2009 10:38 am • link • report
by Reid on Jun 30, 2009 10:38 am • link • report
You proposals would be 40 minute waits in off peak hours for a shuttle bus and/or delayed Blue line trains to the airport for people who live on the orange line.
At that point, cabbing or driving to the airport makes more sense.
by charlie on Jun 30, 2009 10:40 am • link • report
by NikolasM on Jun 30, 2009 10:47 am • link • report
by BeyondDC on Jun 30, 2009 10:49 am • link • report
by Simon on Jun 30, 2009 10:55 am • link • report
by Mark on Jun 30, 2009 10:56 am • link • report
In spite of the current major recession, robust residential and commercial development continues apace along the Orange line's path, with few signs of it slowing. Large developments are underway in Claredon and Ballston and much more is planned. In addition, mid- and high-rise residential development is now sprouting up in and around the East Falls Church and Dunn Loring Metro stations. There is also chatter, too, of extending the Orange line beyond the Vienna station, which itself is slated for dense development. It goes without saying that the additional residents and workers this development will generate will only increase pressure on a system that is bursting at the seams as it is.
The only long-range solution to this festering problem is another tunnel and track under the Potomac. Rerouting Blue and future Silver line trains to bypass the tunnel is nothing short of a band-aid approach. WMATA needs to plan for another Rosslyn tunnel not five or 10 years down the road, but now, right now, before the situation becomes acute.
by InArlington on Jun 30, 2009 11:22 am • link • report
by Vik on Jun 30, 2009 11:27 am • link • report
And I do agree with InArlington, this is a band-aid. Innovative solutions like this are needed and should be encouraged all the time but a tunnel is what's needed and we need to do what's necessary to start to fund this.
by Vik on Jun 30, 2009 11:31 am • link • report
The Silver Line option is interesting, but might require a Pentagon-north station. The shuttle would come to infrequently and would cause all kinds of fuss reversing and going through two interlockings at rush hour. Besides, anything that would so significantly reduce existing service would be politically herculean.
by цarьchitect on Jun 30, 2009 11:38 am • link • report
by Froggie on Jun 30, 2009 11:46 am • link • report
Use the shuttle train option but also have the track from Court House to Arlington Cemetery.
Instead of having the Blue Line into the city, have the Blue Line become an all Virginia train, running from Dulles through Court House and Arlington Cemetery to Franconia-Springfield.
This creates:
-An easy commute from the Dulles Corridor to the Pentagon and south
An easier commute from East Falls Church through Court House to National Airport and Alexandria.
- You could probably get away with running these trains a tad less frequently than the Silver and Orange line trains, addressing the biggest concern: congestion from East Falls Church and points east into the city once the Silver Line is completed.
Granted, people commuting to Farragut West, etc., from the Pentagon and points south now have to make a transfer, but I think given all the options, a transfer at Court House or L'Enfant Plaza adds maybe 10 minutes to their commute? I think it might be a sacrifice that has to be made.
by Justin on Jun 30, 2009 11:50 am • link • report
by tom veil on Jun 30, 2009 11:52 am • link • report
I do like the new connections option with an addition of another pentagon station, which could be a problem. I'd hate to see the security situation prevent us from pursuing this. Schematically, it looks like a good plan. The cons as noted would be of high concern to me though.
by Vik on Jun 30, 2009 12:18 pm • link • report
By the way. I never see how the silver line will cause mayhem on Rosslyn. In rush hour, you now have 2 orange lines for every blue. What's gonna happen is that one of those two will be replaced by a silver line. That only affects the beyond EFC stations on the orange line, and that's fine.
by Jasper on Jun 30, 2009 12:19 pm • link • report
So, yes, I'd rather have easier access to National than mediocre access to Dulles. As I've said, if you want transit to Dulles take the damn bus at Falls Church.
(yes, I know Metro to dulles is really metro to Wiehle road, but whatever)
by charlie on Jun 30, 2009 12:46 pm • link • report
by Froggie on Jun 30, 2009 1:13 pm • link • report
One way is to have Blue Line trains take a different tunnel from Rosslyn. That's the ideal solution. But we could also decouple Blue and Orange/Silver/whatever if we weren't putting the trains from the south across the Potomac at Rosslyn at all (possibility 1) or if some of the trains from R-B could go down to 14th Street instead of the Rosslyn tunnel (possibility 2).
by David Alpert on Jun 30, 2009 1:15 pm • link • report
A separate blue line, not sure what alignment is being thought up, is another long-term issue that doesn't even seem related to this. Like a green-line extension to BWI. I think fixing this bridge/tunnel situation is the most important thing, if that's done, than maybe a separate blue line is even more attractive.
by Vik on Jun 30, 2009 1:27 pm • link • report
I agree with all who say these options are just band-aids... More tracks, separated tracks, etc. are inevitably necessary.
by Justin on Jun 30, 2009 1:35 pm • link • report
Commuting from Alexandria to the R-B corridor now is not that much fun. I worked in Ballston for several years and it was much easier for me to drive from Alexandria along George Mason Dr., park the other side of 66 and scooter along the bike paths than brave the Blue and Orange lines. I don't know that changing at L'Enfant Plaza makes it that much worse.
A shuttle would be fairly fast. WMATA timetables Blue line between Pentagon and Rosslyn at 5 minutes (with the stop at Arlington Cemetery). So figure round trip around 12 minutes with one trainset (evenings). Two trainsets (non-rush days) give six minutes headway. Four trainsets (rush-hours), three. You probably only need two-car trainsets.
My own preference, though, is to extend the Rt 1 streetcar along the Pentagon-Rosslyn metro tracks (and then, ideally, across Key Bridge into Georgetown).
by jim on Jun 30, 2009 1:55 pm • link • report
Mixing the routes like that would preserve existing transit paths for the current ridership while maximizing the river-crossings and making for far fewer connections in the overall system - something that becomes more important once people have picked apartments based on proximity to their line, or are lugging heavy bags to get to the airport.
It's certainly not a replacement for the Separated Blue Line, but it's an alternative and potentially a complementary one.
Regarding skipping the Pentagon -
You're right, it's a problem. Potential solutions involve a pocket track that WMATA already plans to construct past the station, or a Pentagon North station - which is not entirely inappropriate given that it can be a 1km walk from the parking lot to the existing station.
by Squalish on Jun 30, 2009 2:03 pm • link • report
by spookiness on Jun 30, 2009 2:14 pm • link • report
So again, I do not understand why anybody is focusing on burning money on a project that ultimately is no solution for the problem.
by Jasper on Jun 30, 2009 4:52 pm • link • report
I do think, we need more ways into the city in the long run, but the Silver Line is going to be up and running, stretching capacity, before we get anything like that built. The only way to make room for more Orange Line and Silver Line trains is to get the Blue Line trains off the same track. Without the Blue Line as it exists today, more Yellow Line trains could run on the same tracks that they run today and it's a reasonable way for South Arlingtonians and Alexandrians to get into the city.
by Justin on Jun 30, 2009 5:07 pm • link • report
Metro's a network.
I agree that we need another Potomac crossing. But we aren't going to get one anytime soon. We are going to have all the Yellow and Blue trains going over the 14th St bridge once the Silver line comes on. There aren't any other alternatives. If we try to send all that traffic up the E tracks, then we may have to throttle the Green line back further. A short stretch (it's just over a mile from the existing yellow line tracks up 9th St to Mt. Vernon Sq.) of tunnel, some of which is under the Mall and a connecting pedestrian tunnel to L'Enfant Plaza is not that expensive and relieves the pressure on SE Washington.
by jim on Jun 30, 2009 5:44 pm • link • report
@ Jim: Metro's a network.
It is not. If you look carefully, you see that metro depends very much on a few transfer stations downtown. That is the whole problem To get rid of that, we need more metro. Everywhere. Extensions at the end of lines. New lines. And more capacity downtown. Reshuffling lines does not create more capacity. It's pushing the problem more to the future.
by Jasper on Jun 30, 2009 6:06 pm • link • report
Make a change one place and it impacts someplace else. In our case ('cos my stop is King St.), the development along the Rosslyn-Ballston strip has meant that jam-packed Orange line trains have pushed Blue line trains out of the tunnel. Blue line trains, even in rush hour, run at six minute headways. Orange line trains run at three minute headways. That's because Blue line trains get only a third of the tunnel. Once the Silver line trains want to get through the tunnel as well, there will be even less room for Blue line trains. That's a network effect. Add traffic along one set of tracks, traffic along another set of tracks will be inhibited.
It's not a question of transfer points. It's a question of tracks and switches.
by jim on Jun 30, 2009 7:57 pm • link • report
by David on Jun 30, 2009 9:16 pm • link • report
Not true. The silver trains will just replace one of the orange ones.
And again. Metro is barely a network. These are a networks:
http://images.intolondon.com/images/intolondon/transport-maps/london-underground-tube-map.gif, http://www.ecocompactcity.org/Metropolis/Paris-Metro-Map.gif, http://www.mkc-properties.com/images/livinginjapan/tokyometromapbig.jpg, http://upload.wikimedia.org/wikipedia/commons/e/ed/Beijing-2008.png, http://www.waytorussia.net/Moscow/images/metro.gif, http://mexico-on-line.com/mexico-city-maps/mexico-city-metro-subway-map.gif, http://people.reed.edu/~reyn/Seoul.2001.gif, http://johomaps.com/na/usa/newyork/newyork/newyorkmetro.jpg
London, Paris, Tokyo, Beijing, Moscow, Mexico City, Seoul, NYC.
Our metro system is comparable to that of:
http://www.urbanrail.net/eu/kie/kyiv-map.gif, http://www.iranian.com/Features/2002/May/Metro/Images/map.gif, http://people.reed.edu/~reyn/MontrealMetro1998.GC.JPG, http://www.planetware.com/i/map/E/barcelona-metro-map.jpg, http://www.urbanrail.net/as/taip/taipei-map.gif
Kiev, Tehran, Montreal, Barcelona, Taipei
Just sayin'
by Jasper on Jun 30, 2009 9:54 pm • link • report
With the 9th street idea, completing the entire line would mean that you have a new Yellow line before you have a new Blue line, which I think everyone would agree is the wrong order.
Any such ideas ought to have a long term plan behind them. We benefit today from the fact that Metro was conceived and built as a whole 100 mile system. Expansions should be similarly planned as a whole.
More thoughts on the issue here:
http://cityblock.wordpress.com/2009/06/30/adding-to-metros-core-capacity/
by Alex B. on Jun 30, 2009 10:09 pm • link • report
Unless you're going to one of those three stations, you're guaranteed a two-transfer trip by using that shuttle.
by Gavin Baker on Jun 30, 2009 10:33 pm • link • report
(métro)
http://www.stcum.qc.ca/English/Metro/a-mapmet.htm
(commuter rail)
http://www.amt.qc.ca/TC/TRAIN/images/plans/Carte_Train_2009.pdf
by Craig on Jul 1, 2009 12:09 am • link • report
by Jasper on Jul 1, 2009 1:01 am • link • report
by wlerik on Jan 24, 2013 9:58 pm • link • report
Part of the justification of a separated Blue Line is that the Red Line is Maxed out. Part of justifying a new Union Station is its importance delivering people to downtown.
Seems that a new 10th Ave Subway with a new Amtrak Central Station on top of it is better & cheaper than what Amtrak and Metro are proposing separately.
by Kevin C on Jan 26, 2013 11:21 pm • link • report
by AWalkerInTheCity on Jan 27, 2013 12:27 am • link • report
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