DOL registration data was downloaded and processed to summarize the total number of registered certain electric vehicles by year for both county and census block groups. Transactions Counts were summed by year for all Transaction Types. Data were filtered to only include plug-in hybrid electric vehicle (PHEV) and batter electric vehicles (BEV). Source data transaction types include: 

1. Registration Renewal - continuation of vehicle driving privileges. Commonly referred to as "getting new tabs". 
2. Registration at time of Transfer - renewals that occur when the ownership of a vehicle changes. 
3. Original Registration - first ever issuance of vehicle driving privileges in Washington. Processed registration data were joined with spatial data to create a feature class for the last full calendar year of registration data.

Data includes transactions completed from January 2011 through December 2024. DOL updates data monthly, this dataset will be updated quarterly.

Sources:

• Department of Licensing Vehicle Registration Summary attribute data downloaded from the Washington State Open Data Portal. 
• County Boundaries obtained from Washington State Department of Natural Resources.
• Department of Licensing Vehicle Registration Transactions attribute data downloaded from the Washington State Open Data Portal. 
• 2020 Census Block Group spatial data was obtained from the Washington Office of Financial Management. 

REST URL: https://services.arcgis.com/IYrj3otxNjPsrTRD/arcgis/rest/services/DOL_EV_Registrations/FeatureServer

Please direct questions about this layer to partnerships@wsdot.wa.gov.

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