Architect Steve Wiser has this idea for using gambling to pay for bridges:

But in all seriousness, here is Wiser’s real bridges plan. (PDF)
Some highlights:
…build two local-access bridges: one parallel to the Clark Memorial Bridge, and the other parallel to the K & I Bridge. These local access bridges will remove resident traffic from the Interstate bridges. Also, Build I-71/I-64East Downtown-Med Center Access Connector
Connect these two new local-access bridges by an upper-level ‘busway’. This busway will facilitate access for the Medical Center, Arena-Hotels-Downtown, Russell-Portland neighborhoods, New Albany, Clarksville, and Jeffersonville.
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