Louisiana Department of Transportation and Development—Interchange US 90 at LA 318

This $55.7 million project upgraded the existing US 90 corridor (Future I-49) at LA 318 from a signalized intersection to a full control of access, grade-separated interchange including the reconstruction of the US 90 frontage roads. The project improves connectivity for industrial and freight transport to the sugar mill and port-related industries, as well as increase capacity and improve overall mobility and safety.

The innovative Alternative Design Concept decreased the original reconstruction area, eliminating the westbound loop entrance ramp and bridge structure by using a tighter westbound ramp configuration.  This concept avoided eight properties reducing the required right-of-way by 20 percent while reducing environmental impacts to wetlands. This also allowed the ramps to be used to maintain traffic during construction. This configuration reduced the project cost by $9 million and construction time by nine months relative to the next lowest bidder. Connectivity and congestion is no longer an issue for drivers in this area, who ended up with a smoother commute in the area (and faster than originally planned).