The state Senate Transportation Committee on Tuesday made significant changes to a transportation bill approved by House lawmakers earlier this year. Sen. Butch Miller, R-Gainesville, said he expects the bill to make it to the floor of the Senate for a vote by Friday. The committee approved the Senate’s version of the bill, which would convert Georgia’s mix of taxes on gasoline to a 24-cent per gallon excise tax instead of the 29.2 cents per gallon tax in the House plan.