Pennsylvania politicians seeking increased spending on roads and bridges point to a new report that outlines the unseen costs of the state’s crumbling infrastructure. (snip) The report states that the average driver in Harrisburg will incur $1,646 in annual expenses related to poor road conditions. (snip)Gov. Tom Corbett has proposed uncapping the gas tax as a way to eventually generate $1.8 billion dollars over five years for transportation funding. The proposal would affect the oil-franchise tax, a tariff applied to the wholesale price of gasoline. Currently, the tax only applies to the first $1.25 of the cost of a gallon,...