On Tuesday, we featured the 109th challenge to see how well you knew the Metro system. Here are the answers. How'd you do?

This week, we got 34 guesses. 26 got all 5. Great work, everyone!

Image 1: L'Enfant Plaza

The first image shows the eastern entrance to L'Enfant Plaza. Here the escalators are covered by a building, and this view looks out of the alcove northward toward the VRE tracks. One clue is the abandoned catenary mast above those tracks. It dates to the days when the Pennsylvania Railroad ran electric freight trains from New Jersey to Potomac Yard. The other more obvious clue is the pylon, which has five stripes. L'Enfant Plaza is the only station served by five lines.

31 got it right.

Image 2: Eastern Market

The second image shows the entrance canopy at Eastern Market. This is the only station along the wide Pennsylvania Avenue median, which used to host streetcars.

29 figured it out.

Image 3: Rockville

The third image has a view of Rockville station from the lobby, as Peter K correctly noted, of the Montgomery County Department of Permitting Services. Two Ride On buses are visible, as is the eastern end of the bridge over Rockville Pike.

30 knew this one.

Image 4: Van Ness

Van Ness was the fourth image. This view shows the eastern street escalator, with a view of the UDC campus in the background. The signal masts are standard DC style, so that was one clue, but the context was the primary way to solve this one.

30 guessed correctly.

Image 5: Navy Yard

The final picture shows the New Jersey Avenue entrance to Navy Yard station. The main clue was the visible New Jersey Avenue sign, but the US DOT headquarters may have also helped you pick the right station.

34 came to the correct conclusion.

Great work, everyone. Thanks for playing! We'll be back in two weeks with week 110.

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 Capitol Hill. 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.