Construction crews have worked hard to finish ahead of the 2023. Interstate 35 is one of the most critical freight corridors in the united states. It is critical to the state economy and the local economy. Webthe new southbound interstate 35 bridge over the brazos river is scheduled to start carrying southbound traffic overnight tuesday into wednesday. Highway 290 east to. Webefforts to replace the highway 6 twin bridges over lake waco and reconstruct waco’s southern leg of interstate 35 could begin as early as next year.