During this time of unprecedented volatility in travel, how is the drop in vehicle miles traveled (VMT) affecting your planning? Get the facts to inform your estimations for gas tax shortfalls, pollution changes, and more. Our VMT Monitor offers county-by-county VMT Metrics for more than 3,100 U.S. counties, updated 3X per week.
The VMT Monitor fuses Cuebiq’s near-real time Mobility Index with StreetLight’s algorithms that transform location data into contextualized, aggregated, and normalized travel patterns, as well as our deep repositories of data depicting historical VMT.
Contact us for access to Volume, Origin-Destination and other metrics to understand COVID-19’s impact on travel patterns, toll revenues and more.
How to use this map:
- Hover over the map to find your county of interest.
- Use the Daily County VMT calendar to specify date.
- Percent Change indicates change in daily VMT from baseline, defined as average daily VMT of the most recently processed month in our online portal. Note, it is updated every two days with a ~48-hour lag in data availability. Please come back in 48 hours to access additional days.
More on methodology and CSV access
Notes on methodology: StreetLight’s VMT Monitor provides our estimate of total vehicle miles travelled (VMT) by residents of each county, each day since the COVID-19 crisis began, as well as a change from the “baseline.” We define baseline as the average daily VMT of the most recently processed month in our online portal. The VMT Monitor data is distinct from the “Mobility Index” data published by our partner Cuebiq. The Mobility Index is an epidemiological concept and is not linearly correlated to actual change in miles traveled (for example, a reduction of 10% in Mobility Index doesn’t mean there is a 10% reduction in VMT). While both metrics are important, we felt that for our transportation community VMT is typically a more actionable indicator, as it relates directly to gas taxes, wear on roads, emissions, and more. We therefore partnered with Cuebiq to fuse their Mobility Index inputs with StreetLight’s historical VMT data, as well as newly developed algorithms, to create the VMT Monitor. Click here to download the methodology and validation document.
CSV access: The downloadable VMT Monitor CSV file is composed of daily VMT figures for all mapped counties, starting with January 1, 2020. It is available at no cost to qualified researchers and public agencies.
Learn more about using StreetLight’s metrics to manage through the COVID-19 downturn
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