TRANSPORT
DATABOOK
Global transit data, maps, and analysis.
US Transport Use
Data and charts on transportation usage patterns in the United States, based on the Census American Community Survey and other sources. Transport Databook is a project of The Transport Politic and Yonah Freemark.
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* City/place data includes only cities and places with at least 25,000 workers in the 2020–2024 ACS 5-year estimates.
* Connecticut data reflect 2020 ACS planning regions, approximated onto the state's former 8 county boundaries. The Naugatuck Valley and Western Connecticut planning regions are not displayed. Pre-2020 Connecticut figures are carried over from the former counties into the planning regions that replaced them, so historical trends there are approximate.
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Notes: Commute mode share data from the U.S. Census Bureau American Community Survey, 5-year estimates (2020–2024), sourced via IPUMS NHGIS (Schroeder et al., 2025). Data represent workers 16 years and over. County-level estimates may carry substantial margins of error for small or rural counties, particularly for minority modes. Metropolitan area figures are compiled by summing the counties that make up each Core-Based Statistical Area; metro definitions follow the Office of Management and Budget's July 2023 CBSA delineations (the most recent vintage), as reflected in the Census Bureau's current TIGER geography. Connecticut metros are built from the state's nine planning regions.