5 Data Sources

A. Census

Decennial Census, accessed vai National Historical Geographic Information System

• 1970, 1980, 1990, 2000, 2010
• Steven Manson, Jonathan Schroeder, David Van Riper, Tracy Kugler, and Steven Ruggles. IPUMS National Historical Geographic Information System: Version 16.0 [dataset]. Minneapolis, MN: IPUMS. 2021. http://doi.org/10.18128/D050.V16.0
• County and county-equivalent data

American Community Survey

• 5-year estimates: 2006-2010, 2007-2011, 2008-2012, 2009-2013, 2010-2014, 2011-2015, 2012-2016, 2013-2017, 2014-2018, 2015-2019
• County, county-equivalent, and block group data
• Data available here.

Jurisdictional boundaries

• We use TIGER/Line Shapefiles from the Census, based on 2010 Census boundaries. Files available here.

B. Washington Metropolitan Transit Agency

• WMATA budgets
C. Major Transportation Projects
• Sources for cost estimates below.
• Beltway Express Lanes
• Silver Line
• Purple Line
• Long Bridge
• Atlantic Gateway
• Frederick Douglass Memorial Bridge
• 11th Street Bridges
• Potomac Yard Metro Station
• H Street Bridge Replacement
• DC Streetcar
• K Street Transitway
• Georgetown-Rosslyn Gondola
• DC Priority Bus Lanes
• Long Bridge Pedestrian and Bike Bridge
• Capital Bikeshare Expansion
D. Vehicle Miles Traveled
• Traffic Volume Trends, Federal Highway Administration for the Capital Region, October report, 2005-2019. See here.
• 2020 Annual Vehicle Miles of Travel in Millions by Functional Classification, Maryland Department of Transportation, yearly report, 2005-2019
• Daily Vehicle Miles Traveled (DVMT) by Physical Jurisdiction, with Towns Combined into Counties, Virginia Department of Transportation, yearly report, 2005-2019.
E. National Transit Database
• National Transit Database, 2002-2019.
F. Census of Governments
• Accessed via Willamette University
• Pierson K., Hand M., and Thompson F. (2015). The Government Finance Database: A Common Resource for Quantitative Research in Public Financial Analysis. PLoS ONE doi: 10.1371/journal.pone.0130119