Illinois gas prices are already among the highest in the nation and a new gas tax could force drivers to pay even more at the pump. The Transportation for Illinois Coalition is asking lawmakers to increase the tax by four-cents-per-gallon because funding for the capital construction program is set to expire this year. They say the extra money will generate enough revenue to make sure bad roads and bridges can be fixed up. Gas station owners disagree. They say the state is already bringing in more than a-billion-dollars-a-year from the gas tax and much of that money isn't being used for roads, like it's supposed to be.