Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.

Plug-in hybrid electric vehicle data collection pilot project

Plug-in hybrid electric vehicle (PHEV) technology has the potential to dramatically reduce harmful greenhouse-gas emissions by powering vehicles with a cleaner alternative to fossil fuels. The Puget Sound region is well suited to spearhead the use of electricity as a clean alternative energy source because much of the electricity produced here comes from hydropower.

King County is committed to being a nationwide leader in bringing PHEV technology into commercial use. As a first step, it is converting four existing Toyota Priuses to PHEVs as part of a joint research project with Idaho National Labs and three other regional agencies: the City of Seattle, the Port of Seattle, and the Puget Sound Clean Air Agency. This research will collect valuable performance data that will lead to better electric vehicle technology—technology that will one day transform the automobile industry as we know it.

Plug & Ride sign

These signs mark charging stations for plug-in electric hybrid vehicles at Metro park-and-rides.

photo: car with graphic of red electric cord and plug

One of four Toyota Priuses converted to a plug-in electric hybrid vehicle as part of King County’s pilot project.

photo: close-up of an electric cord fueling a plug-in car

A plug-in Toyota Prius is refueled.