In this post about what is driving sales of the Plug-in Prius (PiP),  commenter "ScottF200" asserts that single occupant access to HOV lanes is quite likely a leading reason for strong PiP sales in California. Pointing to this quote from the PriusChat forums:

I just bought my PIP and I am enjoying it for the most part, especially the electronics. What I’m trying to figure out is whether it’s worth charging it versus just using it as a hybrid. 1. I should say that the primary reason I bought it was to get a green HOV sticker here in California.

ScottF200 also pointed to this article in the NY Times article of July 2011 that noted the frustration of legions of non plug-in Prii drivers losing their HOV stickers

Commenting for that article was Sam Butto, a Toyota spokesman, who notes

California sales accounted for one out of every four (alternative powertrains) sold in the United States


Addressing how instrumental HOV access was to selling Prii Mr. Butto said:

When those cars were eligible for California’s H.O.V. lanes, we sold out our allotment in no time," Mr. Butto said. "We expect that the ability to use the H.O.V. lanes will be one of the most popular reasons people will buy the Prius Plug-In Hybrid. We may sell one in three or one in four of our plug-in hybrids in California.

Similarly Scott Doggett, an editor at Edmunds’ commented that

When the H.O.V. access for California hybrids went away, it left thousands of drivers very frustrated, because their commute times had doubled or tripled. The ability to use H.O.V. lanes is a very good marketing tool for Toyota.

GM lengthened the warranty on the Volt from 8yrs/100k miles to 10yrs/150k miles and modified the emissions package to meet the CA requirements. The longer battery warranty is only available on CA cars.

The Admin from the PriusChats Facebook site suggests that GM may have some work to do in order to correct the perception that the Volt does not qualify for the Green Sticker.  Stating:

The Volt not qualifying for carpool stickers in California from Day 1 hurt it. Once the idea is in a customer's mind that the car doesn't qualify for carpool stickers, it's hard to get that out of their head; they've already moved on.

If true, GM will need to react quickly to make it clear that the Volt now qualifies for the Green Sticker in CA. The California Air Resources Board limits the Green Stickers

To the first 40,000 applicants that purchase or lease cars meeting California's enhanced advanced technology partial zero emission vehicle (AT PZEV) requirements. Green stickers are valid through January 1, 2015


Sources (NY Times, PriusChat Forums and FB page, CARB)

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