LANSING, Mich. (AP) — The Michigan Senate is considering whether to raise the state gasoline tax by 15 cents a gallon to help improve roads.

Majority Republicans meet privately Tuesday to potentially finalize legislation to spend at least $1 billion a year more on transportation infrastructure. The proposal would raise the 19-cent gas tax by a nickel each year over three years.

GOP leaders also are expected to call for redirecting general funds toward roads and possibly cutting Michigan’s income tax if future revenues are healthy.

A Senate committee could approve the bills later Tuesday.

The House has passed legislation that includes earmarking general funds for roads and eliminating a tax credit for lower-wage earners.

Voters last month rejected sales and fuel tax increases to boost spending on roads, education and municipal services.