The Massachusetts Vehicle Census (MVC) is the first state-level dataset in the nation that joins vehicle-level odometer readings with vehicle attribute and registration transaction histories. This powerful resource allows policymakers, researchers, and other stakeholders understand state and local trends in vehicle usage and ownership.

The Massachusetts Vehicle Census Annual Zip Code dataset contains annualized aggregations for annual VMT (Vehicle Miles Travelled) grouped by postal Zip Code, municipality, and vehicle attribute. The dataset uses excise tax data and annual vehicle inspection odometer readings as data inputs. Annual VMT is calculated by a vehicle's estimated daily mileage multiplied by the amount of days a vehicle is actively registered in its corresponding Zip Code.