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
- 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.
- We use TIGER/Line Shapefiles from the Census, based on 2010 Census boundaries. Files available here.
- 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
- 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.
- National Transit Database, 2002-2019.
- 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