I have had the honor of working with a bunch of PEV stakeholders during 2012 to compile and produce a large amount of PEV data and recommendations in one of the regional planning taskforces funded by the Department of Energy found in the plan below.
From the Advanced Energy site:
"The North Carolina PEV Readiness Plans were supported through the NC PEV Readiness Initiative: Plugging in from Mountains to Sea (M2S) planning project with funding provided by the U.S. Department of Energy's Clean Cities Program through Centralina Council of Governments. Project collaborators include: Advanced Energy, Land-of-Sky Regional Council, NC Solar Center/NC State University, Piedmont Triad Regional Council, & Triangle J Council of Governments."
There is a wealth of information in this comprehensive, large document, that will help a wide range of people including but not limited to individual purchasers, employers, and local and state government to plan for electric vehicles. While this focuses on North Carolina, much of the information is general in scope, and will apply everywhere.
I encourage you to go through it.
The plan can be found here in PDF format:
The referencing page is here with some more details: