The S.C. House voted 97-18 Wednesday to increase the state’s gas tax and other driving fees to raise about $600 million a year to repair the state’s crumbling roads and bridges. Under the plan, the state’s gas tax would increase by 2 cents a gallon each year for the next five years. When fully phased in, the 10-cent-a-gallon increase would cost the average S.C. driver $60 a year. The state Department of Transportation estimates it needs an added $1 billion a year to repair and maintain S.C. roads. “We’re at crisis point when it comes to roads in South Carolina,” said House Majority Leader Gary Simrill, R-York, who has championed the bill.