Week Without Driving: October 1-8, 2026

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What would change in your life if driving wasn’t an option?

Nondriver Data

This data was compiled by and shared with Week Without Driving courtesy of the Climate and Community Institute (CCI). The maps were created by CCI fellow Kira McDonald, as part of research efforts for the CCI brief “Cheated by Car Dependence.”

A map of the United States showing the percentage of households with zero cars, color-coded to represent different percentage ranges from 0.6% to 79.8%.
Percent in Zero-Car Households
A colorful map of the Northeastern and Midwestern United States, displaying states like New York, Pennsylvania, Ohio, and parts of Canada, with varying shades indicating different data points.
Average Ratio of Cars per People Age 15+
A map of the southeastern United States showing various regions with different colors, highlighting cities such as Houston, Atlanta, and Miami.
Percent Car-Light Households
Map showing regions of California and Arizona, highlighting cities such as Los Angeles, San Diego, Las Vegas, and Phoenix with varying colors.
Average Ratio of Cars per Person

How to interpret the maps

  1. The geographic units that divide the map are large-scale communities, typically comprised of  towns, counties, groups of counties, or neighborhoods within larger cities. Technically, they are defined as Public Use Microdata Areas (PUMAs), defined by the US Census as “non-overlapping, statistical geographic areas that partition each state or equivalent entity into geographic areas containing no fewer than 100,000 people each.
  2. Hover the cursor over a PUMA to see the value.
  3. Click on a PUMA to see more information, including the name of the PUMA, the population density (people per square mile), population, etc.
  4. Use the search window to look up a specific PUMA or geographical keyword.