A group that wants to give Michigan voters the right to weigh in on future international bridges has turned in about 609,000 petition signatures to put the measure on the November ballot.

The People Should Decide submitted the signatures Monday to the secretary of state's office. About 322,610 valid signatures are needed to make the Nov. 6 ballot.

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If the measure passes, Michigan voters would have to approve the building of any international bridge between Michigan and Canada.

Support comes from the owners of the Ambassador Bridge, who don't want a competing bridge built between Detroit and Windsor, Ontario.

Gov. Rick Snyder reached with a deal with Canadian officials last month to build a second bridge. He says the ballot proposal has no bearing because state money's not involved.