Between 2017 and 2020, I wrote nearly twenty articles for the D.C. Policy Center, a Washington, DC think tank focused on urban issues in the Washington, DC region. These articles covered a number of topics, including Metrorail’s service cuts and ridership issues in 2017-2018, proposals for improved suburb-to-suburb transit in the DC region, and the demographic history of the region.

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Metrorail Cuts and Ridership Issues, 20172018

Between March and May 2017, I wrote a series of five articles for the D.C. Policy Center on WMATA‘s Metrorail service cuts and fare increases, comparing Metrorail’s fares and service to those on other US rapid transit systems, as well as DC commuter rail fares to fares on other US commuter rail systems. These were followed by an article in February 2018 on how the Metrorail service and funding crisis had led to Metrorail no longer being the second-busiest rapid transit system in the United States.
Note: Several of these articles were republished by Greater Greater Washington.




Suburb-to-Suburb Transit in the DC Region

In February and March 2019, I wrote a seven-article series for the D.C. Policy Center making extensive proposals for circumferential transit in the DC area, including Purple Line extensions to Tysons Corner and Largo and a number of bus rapid transit lines. My analyses included estimates of construction cost for the Purple Line extensions and maps of activity density along the proposed routes, and I discussed both projects currently in the planning phase—largely bus rapid transit lines in Northern Virginia—and projects that I think deserve more serious consideration than they have so far.
Note: These articles were republished by Greater Greater Washington.

A map of the share of workers residing in each Census block group in the Washington, DC area who commuted to Tysons Corner, based on 2015 LEHD-LODES data. In much of the area of Fairfax county north of US-50, this percentage was in the 10%-20% range, while large portions of Fairfax, Loudon, and Arlington Counties had values in the 5%-10% range. East of the Potomac, the percentage never exceeded 5%.

This article series caught the interest of the Washington Metropolitan Area Transit Authority (WMATA) Board, and I was invited to give a ten-minute presentation to the board on the Washington, DC region’s need for circumferential transit. The slides from my presentation are available online here.




Demographic History of the Region, 19702020

Between July 2019 and January 2020, I wrote a series of four articles for the D.C. Policy Center with maps of population density and race, income, and education demographics in the DC area from 1970 to present, based on data from the National Historical GIS Database. I hope to eventually extend this analysis back to 1860 or earlier by hand-entering data from Census reports into minor civil division geometries derived from old maps. However, this will be a major undertaking and I have no estimate of when I will be able to complete it.

Note: These posts were republished by Greater Greater Washington.

A GIF animation showing population densities in the Washington region by decade from 1970 to 2010. In 1970, most non-rural population density was found within the Beltway, but by 2010, it had extended to a much larger region.
Density in the Washington region:
Dark gray indicates a density of <1.5 people per acre.
Dark purple indicates a density of 1.5-7.5 people per acre.
Light purple a density of 7.5-15 people per acre.
Orange indicates a density of 15-30 people per acre.
Yellow indicates a density of >30 people per acre.

Data for 1970-2010 is from the IPUMS National Historical GIS, University of Minnesota, www.nhgis.org. Present-day county borders, transit, and roadways are shown on all years’ maps. Image by the author.




Other Topics

In addition to the three series on Metrorail service cuts, suburb-to-suburb transit proposals, and demographic history, I wrote two stand-alone pieces for the D.C. Policy Center.

A map of the Federal government's 1959 Mass Transportation Survey proposal for a two-line rapid transit system in Washington, DC. Two lines are shown, intersecting in downtown DC. One runs south from Wheaton to Alexandria, with the portion from Riggs Road to the Potomac River underground. The other runs south from the Beltway along Wisconsin Avenue to roughly Farragut Square (underground south of the DC border), then east through downtown DC, and turns south again from Union Station to Historic Anacostia.
A map of the Federal government’s 1959 Mass Transportation Survey proposal for a two-line rapid transit system in Washington, DC.