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The purpose of this research project is to understand how various factors affect operators’ decisions on when and where to charge their plug-in vehicles. This is a research project being conducted by Donald MacKenzie at the University of Washington and David Keith at the Massachusetts Institute of Technology.

You are invited to participate in this research project because you operate a plug-in electric vehicle (EV).

Your participation in this research study is voluntary. You may choose not to participate. If you decide to participate in this research survey, you may withdraw at any time. If you decide not to participate in this study or if you withdraw from participating at any time, you will not be penalized.

The procedure involves filling an online survey that will take approximately 5-15 minutes. Your responses will be confidential and we do not collect identifying information such as your name, email address or IP address.

The survey consists of three parts:

1. We will begin by collecting some background information about you, your vehicle, and your household.
2. Next we will present you with a series of situations that you might encounter while driving your plug-in vehicle. In each situation we will ask you whether you would take the opportunity to charge in those circumstances.
3. Finally, we will collect some additional information about your usual charging patterns, and you will have the opportunity to offer written comments or feedback on the survey.

To help protect your privacy, the survey will not request information that will personally identify you. Survey data will be used for scholarly purposes only and may be shared with colleagues working on the project.

If you have any questions about the research study, please contact Donald MacKenzie and David Keith at

This research has been reviewed according to University of Washington procedures for research involving human subjects.
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