Did Rush Plus depress Blue Line ridership?
To make room for new Silver Line trains at the Rosslyn bottleneck, WMATA has reduced the number of Blue Line (and Orange Line) trains and added Yellow Line trains. A group calling itself Save the Blue Line claims that a similar change in 2012 caused riders to stop using Metro. Is that accurate?
In June of 2012, Metro started a new service pattern in Virginia. To make way for more Orange Line trains and more service in north Arlington and Fairfax, the agency started sending some "Blue" Line trains from Franconia over the Yellow Line bridge to Greenbelt, labeled "Rush Plus" Yellow Line trains.
In the two years since, has that lowered ridership?
It's hard to say with any certainty. Ridership at the stations south of Pentagon is lower than it was before Rush Plus. On the other hand, ridership was already dropping before Rush Plus started.
There's actually an error in the Save The Blue Line graph: while the arrow suggests Rush Plus started between the 2011 and 2012 data points, the 2012 data is actually from a count in May, before Rush Plus started. The arrow should actually point one more space to the right, and therefore the drop you can see on the graph began before Rush Plus.
Did Rush Plus contribute to the ridership drop?
We cannot prove causation from correlation, but perhaps we can glean some insight from the numbers.
If we look just at boardings from Van Dorn Street and Franconia/Springfield, we can see a noticeable dip starting in about 2010. It continues into 2013 before leveling off a bit.
From 2011 to 2012 (one year before Rush Plus), ridership at Van Dorn and Franconia declined 3.94%. That drop contrasted with a systemwide increase in ridership of 0.13%. So before Rush Plus the Blue Line (the end at least) was already losing riders compared to the rest of the system.
The May 2013 number is the first data point after Rush Plus started. In the period from May 2012 to May 2013, ridership at Van Dorn and Franconia shrank 7.81%, significantly more than the systemwide decline of 2.57%.
The ridership decrease was somewhat attenuated between 2013 and 2014, where at Franconia and Van Dorn it dropped only 1.17% compared to 0.55% systemwide.
If we look at all the stations most affected by Rush Plus, from Pentagon south, we see similar trends, though they're less strong.
Prior to Rush Plus, average daily boardings at Pentagon and the stations to the south (to Huntington and Franconia/Springfield) declined 3.68% over the 12 months from May 2011 to May 2012. Following 11 months of Rush Plus, ridership on this section had dropped 4.49% (compared to 2.57% systemwide).
So the data do show that ridership on the Blue and Yellow lines south of Pentagon has been lower since Rush Plus was implemented. But the ridership was already shrinking before Rush Plus.
It's certainly possible that Rush Plus exacerbated the ridership loss, but there's no way to tell for sure with the data available.
Even if Rush Plus did cause a significant drop, there's little WMATA can do. The tracks between Rosslyn and Stadium/Armory are operating at their capacity of 26 trains per hour. With Silver Line service starting this weekend, something has to give. With higher ridership in the Rosslyn-Ballston corridor, WMATA has decided to shift some Blue Line trains onto the 7th Street subway.
The number of trains at Franconia and Van Dorn hasn't decreased. Passengers still have the same number of trains going downtown. But fewer of them go to Rosslyn. For getting to the western end of downtown, some riders will now be better off transferring at L'Enfant Plaza.
WMATA planners are hoping to relieve pressure in the future by upgrading the system to handle more 8-car trains and building new Blue Line platforms at Rosslyn. Future phases could take the line across downtown.
Without more railcars, power stations, and core capacity, WMATA has little alternative but to reduce Blue Line service. That's why riders frustrated at losing Blue Line trains can have the best impact by lobbying their elected officials to fund Metro's plans for 8-car trains, a second Rosslyn station, and eventually a new crossing into DC.
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