“The state’s flat gas tax of 19 cents per gallon is at an all-time low, when adjusted for inflation, according to the Institute on Taxation and Economic Policy. The tax hasn’t been raised since 1997. Increasing the excise tax on gas and diesel fuel and placing it on the wholesale cost of fuel will generate new dollars for roads while causing the least harm to working families,” Jacobs said. Gov. Snyder, during a press conference at Lawrence Technological University, called on lawmakers to take up his proposal to raise gas taxes to generate $1.2 billion to fix roads and bridges.