Streets & Drainage

Southern Loop Shreveport Louisiana

KSA was selected by the State of Louisiana to design the Pines Road Interchange in two separate projects. The first design project involved development of roadway plans for a new diamond interchange for Interstate Highway 49 after it was determined that the existing interstate roadway was in need of replacement. A complete replacement design for over 1.5 miles of four-lane divided highway was incorporated into the interchange design. This new addition provides access to commercial and residential areas of southwest Shreveport. Additional project tasks included topographic surveys, right-of-way mapping, and hydraulic report preparation.

During the second design project, KSA prepared plans to complete the Southern Loop and connect it to the previously designed interchange. The Southern Loop roadway consisted of two, 12-foot lanes composed of a 6-inch asphalt layer over 12-inches of crushed aggregate and asphalt base course. The design also included 0.5 miles of two-lane roadway, associated grading and drainage, slab span bridge, and permitting. The road was designed for a 60 mph speed limit, using Louisiana Department of Transportation and Development (DOTD) criteria and American Association of State Highway and Transportation Officials (AASHTO) recommendations. An environmental assessment (EA), including wetlands determination, environmental clearance, and 404 permit preparation, was also required.