San Francisco Californians already pay the highest price for gasoline in the country, and some analysts estimate proposed changes to the state's low-carbon fuel standard could increase prices at the pump by as much as 65 cents a gallon. The California Air Resources Board is slated to vote on policy changes in November that would lower carbon emissions faster, but increase the cost for refineries. Republican lawmakers are urging state regulators to delay the vote, saying prices at the pump would spike. Gas prices in California are on average $1.47 a gallon higher than the national average mainly because of its gas taxes, the highest in the country. Some state lawmakers say new policies to lower carbon emission standards would hurt everyday residents.