If you build it, they will come!
What route will they take to get there?
The idea of developing downtown Sandusky with condos, hotels, marinas, restaurants, conference centers, etc. has a great deal of merit and is worthy of community support. However, addressing the physical problem of getting traffic to downtown Sandusky should be the first priority, and extending U.S. 250 / Milan Road by making Hancock Street four lanes all the way to Water Street probably offers the best solution.
Just imagine the commerce generated from traffic flowing freely to and from downtown Sandusky and the Kalahari Water Park/ Resort, the mall, and U.S. 250 shopping centers.