On Tuesday, we featured the 135th challenge to see how well you know the Metro system. Here are the answers. How'd you do?

This week, we got 21 guesses. Fourteen of you got all five. Great work, Peter K, AlexC, Ginger, Nick, Teyo, William, Broham McLovin', Brian J, ArlFfx, Rick, JayK, Justin…, Greg Jordan-Detamore, and Patrick B!

Image 1: Clarendon

The first image shows the view looking up the escalator entrance at Clarendon. The main clue here is the building visible at center, 3000 Wilson Boulevard. You may have also narrowed this down based on the arrangement of the entrance, with a stair flanked by escalators.

Sixteen of you knew this one.

Image 2: Dunn Loring

The second image shows a view of Dunn Loring station from I-66. The overhead guide sign should have helped you narrow this down significantly. You can tell that this is a freeway approaching I-495, which includes a left exit. Since this station doesn't match the Silver Line's architectural styles, we know this has to be I-66 and the Orange Line. Since I-66 only has left side exits when eastbound approaching I-495 (all the westbound ramps are on the right), this has to be a station outside the Beltway, which narrows it to Dunn Loring and Vienna.

You can also see from the guide sign that the exit is a fraction of a mile away, because you can see the distance is “1 /...”. Dunn Loring is immediately west of the interchange with I-495, so that makes it the likely candidate. Vienna can be eliminated because the mezzanine is on the east end of the station, rather than the west end, as is the case in this picture.

Nineteen of you got this one right.

Image 3: Franconia-Springfield

The third image shows a view from the mezzanine at Franconia-Springfield. The VRE station is visible here. Even if you didn't immediately recognize it as a VRE station, knowing that this was a commuter rail and Metro interchange station narrowed the field considerably. A close look may have allowed you to identify the diamond-shaped VRE logo to further narrow things down.

Having a mezzanine above the tracks eliminates the other VRE connection stations: L'Enfant Plaza, Crystal City, and King Street.

Nineteen of you figured this one out.

Image 4: Arlington Cemetery

The fourth image shows a street to platform escalator at Arlington Cemetery. This station has four escalators connecting the mezzanine to the platforms, one up and one down for each platform. There are only a few places in Metro where there's a solitary escalator, and Arlington Cemetery has four. The other clue is the ceiling. Arlington Cemetery is one of Metro's unique stations, and the main design feature that distinguishes the station is the non-coffered arched ceiling.

Fourteen of you guessed correctly.

Image 5: National Airport

The final image shows the elevator between the mezzanine and the southbound platform at National Airport. This signage indicating that it's for the platform “to Virginia” is somewhat inaccurate, because the station is in Virginia, and both platforms will take you to destinations in Virginia. However, the fact that the elevator is for one direction only means this has to be a station with separate platforms. The only stations served by the Blue and Yellow Lines that have multiple platforms are L'Enfant Plaza, Pentagon, Pentagon City, Crystal City, and National Airport.

The outdoor nature of the mezzanine and the visible yellow breezeway should have helped you narrow this down to National Airport.

Sixteen of you came to the correct conclusion.

Great work, everyone. Thanks for playing! We'll be back in two weeks with challenge #135.

Information about contest rules, submission guidelines, and a leaderboard is available at http://ggwash.org/whichwmata.

Matt Johnson has lived in the Washington area since 2007. He has a Master’s in Planning from the University of Maryland and a BS in Public Policy from Georgia Tech. He lives in Dupont Circle. He’s a member of the American Institute of Certified Planners, and is an employee of the Montgomery County Department of Transportation. His views are his own and do not represent those of his employer.