Why isn't the bridge designed to be four lanes?

There are no plans to design or build a facility with four-lane capacity.

The bridge is designed to accommodate the traffic that is projected for the year 2030. The traffic studies indicate that this will require a two lane bridge. Once built, the project will be a link within a network of two lane roads. It would not be practical to place a short section of a four-lane facility within a network of two-lane roads. These two factors warrant a two lane facility.