[wcbtinman]

Do you know if these increases also apply to commercial vehicles?

If they do, you can get the truckers to help with your problem, although they will be a bit more pro-active than writing and calling.

Truckers will just slow everything down to a crawl and cause the state to cease doing any practical business. At least that is what they could do if they organized.

[Ernest_at_the_Beach]

Don't know but check this list:

California: Davis seeks compromise on vehicle tax hike

[John Jorsett]

Do you know if these increases also apply to commercial vehicles?

Yes. All vehicles over $5,000 in value, from what I understand.

Rather than slowing things down, truckers would be more useful in helping to circulate the referendum petitions.