On Tuesday, we featured the 143rd challenge to see how well you know the Metro system. Here are the answers. How’d you do?

We had a fun challenge for you this week, in which you needed to combine the answers of two or three photos in a set to come up with the correct “before and after” answer.

This week, we got 15 guesses. 14 of you got all five. Great work everyone!

The first set featured a photo of Silver Spring and a photo of Spring Hill. The correct combination was therefore Silver Spring Hill.

The image of Silver Spring included a photo of the main mezzanine, with the newer fare array allowing access to the west side of the station, into the NOAA plaza.

The Spring Hill view captures the corner of the canopy and a view looking at buildings north/east of Route 7.

Fifteen of you knew this one.

The next set required you to combine Shady Grove and Grosvenor to get Shady Grosvenor.

For Shady Grove, this required you to recognize a Gull I canopy with an entrance plaza at track level on at least one side. Additionally, you can see the top of the northern garage behind the station.

Grosvenor’s canopy was the only clue for the other image in this set. As we’ve discussed before, the peaked skylight at Grosvenor has four panels of glass on either side of the peak, which makes it larger than all the other peaked skylights in the system.

All 15 of you got this one right.

The third pair was formed from the combination of Addison Road and Rhode Island Avenue, forming Addison Rhode Island Avenue.

The Addison Road picture includes several clues, including the unique column tops that carry the canopy, and the end-of-platform entrance consisting of two escalators flanking an elevator. Among above ground stations, only two stations have this arrangement, with the other being White Flint.

The Rhode Island Avenue picture shows a view looking north along the Red Line guideway from the pedestrian bridge that crosses over Rhode Island Avenue. The curved chainlink canopy here is fairly distinctive.

Fifteen of you figured this one out.

The next set paired Clarendon and Dunn Loring to form ClarenDunn Loring.

The photo at Clarendon shows the plaza outside the station. At Dunn Loring, the view looking down to the platform from the mezzanine is unique. Only a few stations have end-of-platform entrances that take up most or all of the width of the platform. These style entrances usually take the form of either three escalators, two escalators and a stair, or two escalators and an elevator. This arrangement is fairly distinctive to Dunn Loring.

Fifteen of you guessed correctly.

The last set required you to combine three stations: Deanwood, Woodley Park, and Morgan Boulevard. The correct combination was DeanWoodley Park-Zoo/Adams Morgan Boulevard.

For the Deanwood image, this view shows the smaller west entrance to the station. We’ve featured this entrance before. It is a simple tunnel entrance with wing walls on either side, similar to one at Grosvenor. Here, the overhead catenary gantry that was formerly used on the Landover Subdivision provides a crucial clue.

The Woodley Park image includes three clues: The Arch I vault, which is present only on the Shady Grove end of the Red Line between Woodley Park and Medical Center; the red dot on the station sign, which Woodley Park is the sole example of; and the vertical strip map, which is only present at Woodley Park.

Finally, the last picture shows the overhead mezzanine canopy at Morgan Boulevard. Morgan Boulevard is one of three stations with the Gull II style, but in the other examples, NoMa and Largo, the mezzanine is below the tracks. That makes this canopy view unique to this station.

Fourteen of you came to the correct conclusion.

Great work, everyone. Thanks for playing! We’ll be back in two weeks with challenge #144.

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.