You seem to know the area quite well. If you haven't been there recently, they are almost done with a new bridge over the Yazoo on Hwy. 61 north of Vicksburg. I travel that way on my way to AR so I don't have to drive through LA. They also have neared completion of a new bridge over the Mississippi river at Greenville. The old steel bridges are about all gone nowdays.
Have a good weekend,
Emri