It’s of the Dupont Circle underpass, taken with a super duper high resolution camera that I borrowed (treat yourself).
Specifically the piece introduces some new concepts in transportation, Congestion Mitigation and Air Quality (CMAQ) and the travel time index (TTI), with some worrisome trends (more single occupancy vehicle commuting) as well as evidence that CMAQ may have been working, since the TTI has dropped (less congestion in Washington, DC). And now CMAQ is threatened for elimination.
Speaking of congestion reduction, the photograph above was taken on an electricity generating sidewalk, which you can see below. DC, where the future is born every day.

Read on…
The Congestion Mitigation and Air Quality Program may be cut in the President’s budget. How has the program helped the District to achieve its goals?