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Well Road Overpass Replacement

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With urban expansion, traffic on the vital Well Road overpass has steadily increased, necessitating a replacement. LADOTD looked to Modjeski and Masters to design a replacement.

M&M provided preliminary and final design services for the replacement of the entire I-20 overpass superstructure using accelerated construction methods. To eliminate long-term construction and closures on the overpass, our innovative solution resulted in an abbreviated construction phase – a single weekend. Prior to the change-out, the new replacement spans were erected on-site at a staging area within the interchange. In addition, substructure units were strengthened while the existing superstructure remained opened to traffic. Next, self-propelled modular transporters (SPMTs) were used to remove the old spans and roll-in the new spans. During the weekend lane closure period, interstate traffic was routed through the interchange ramps. M&M also provided traffic control plans, special provisions, and LRFR rating of the structure. This was the first time that SPMTs were specified during the design of a bridge replacement project for the LADOTD. Despite inclement weather, the project was successfully completed one day ahead of schedule.

For more information, see our project documentary film on YouTube

Bridge Description
Span Lengths 55 to 85 Feet
Total Project Length 262 Feet
Lanes on Structure Two lanes

This is the first time we’ve done [accelerated construction] of this magnitude, but I think we’re going to do more.

-David Hodnett, Engineer for Louisiana Department of Transportation and Development