The Salem Rivercrossing Project is a lot like the Columbia Rivercrossing between Portland and Vancouver: Though the issues are not identical, many are similar, and the planning efforts drive with the same inertia towards elephantine overbuilding.
One important way they are similar is the donut hole: There's no middle. The planning and alternatives have focused on "no build" and hypertrophied "high build" highway options, but little in the way of "low build" options, like a smaller, local bridge for arterial traffic or modifications to the existing bridges. The universe of possibilities looks like it's being constrained as a way to bias the selection.
Spencer Boomhower is doing amazing work up in Portland. Here's a couple of videos on the CRC. Are there any enterprising animators in Salem who would like to do something similar for the Rivercrossing?