NewsChannel 9 (Nashville) » The money for the I-24/I-75 split fix – which state Transportation Commissioner John Schroer calls “one of the most expensive projects we will do” – comes from a bill signed by Governor Bill Haslam back in April that raises the gas tax by 7 cents on the dollar to help pay for highway projects. It’s the first gas tax increase in the state since 1989, and will pay for 962 road projects across the state.