LANSING — Detroit-area voters could be asked to approve a transit tax that is no higher than 2 mills under a bill advancing in the Michigan Legislature.

The measure was approved 32-5 by the Senate Tuesday and sent to the House for consideration.

The Regional Transit Authority of Southeast Michigan was created under a 2012 state law to deliver rapid transit in Wayne, Oakland, Macomb and Washtenaw counties. The authority plans to ask voters in the four counties to approve a property tax millage in November.

The bill would cap the tax rate at no more than 2 mills, or $2 for every $1,000 of a home's taxable value.

It's unclear what tax level the authority will seek, though a senator said it was likely to be less than 2 mills.