After a nearly hour-long debate, the 10-member commission voted 6-3, with one abstention, to approve the funding proposed by Gov. Dannel P. Malloy. Department of Transportation Commissioner James Redeker estimated tolls could raise as much as $1 billion per year, with up to 40 percent coming from out-of-state motorists. Depending on the level of discounts provided to in-state residents, though, the state’s annual take could be closer to $600 million to $800 million.