I-12 Widening (US190 – LA 59)2018-07-26T15:19:11+00:00

Project Description

I-12 Widening (US190 – LA 59)

Public Works – State
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The Challenge

To Be Met

Interstate 12 serves as a major transcontinental corridor for motorist traveling between Baton Rouge and the Mississippi Gulf Coast. Located near Covington, LA, I-12 also serves as the major east-west corridor in St. Tammany Parish and consistently experiences poor capacity performance. LADOTD requested professional engineering and related services to widen I-12 from US 190 and LA 59 from four to six lanes.

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The Solution

Our Creative Approach

TBS is serving as the prime consultant for LADOTD on this interstate widening project which consists of approximately four miles of interstate widening to the median side in St. Tammany Parish, LA. Upon completion, the project will include three lanes in both the westbound and eastbound directions. The interstate segment will include concrete median barrier and cable barriers in forested median areas. The project also includes the widening and rehabilitation of eight bridge sites ranging in structure type from reinforced concrete slab spans to AASHTO Type III prestressed girders and steel plate girders. TBS performed roadway design, including widening and reconstruction; design of bridge widening for the Pontchitalawa Creek and Tammany Trace bridges; environmental support; level 4 traffic management plans; and associated tasks.

Integrated Services

Making the Perfect Solution

  • Feasibility & Planning Studies

  • Unmanned Aerial/Laser Scanning Surveys

  • Topographic & Boundary Surveys

  • Hydrographic Surveying

  •  Subsurface Utility Engineering (SUE)

  • Line and Grade Studies/Alternatives Analysis

  • Traffic and Safety Studies

  • Environmental Studies/NEPA

  • Environmental & Agency Permitting

  • Roadway Design, Intersection Design/Roundabouts

  • Bridge Design/Bridge Rehabilitation

  • Bridge Inspection/Load Rating

  • Construction Services/Shop Drawings

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