I-635 LBJ Express
Dallas- Fort Worth, TX, USA | Texas DOT - 2009 - 2014 | DBFOM | USD $1,100 million
Project Description
The LBJ Express Project involved the reconstruction and expansion of one of the most congested highway corridors in the Dallas metropolitan area, improving mobility along 13 miles of Interstate 635 (LBJ Freeway) and portions of Interstate 35E.
The project included the reconstruction of the main lanes and frontage roads along I-635, as well as the addition of six managed lanes (mostly subsurface) between I-35E and US 75. Additional improvements included four managed lanes east and west of this central section, and the construction of six elevated managed lanes along I-35E between Loop 12 and the I-35E/I-635 interchange.
The project forms part of the North Texas managed lanes network, designed to improve travel reliability and relieve congestion along one of the region’s most heavily traveled commuter corridors.
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Location: Fort Worth, Texas, USA
Owner: Texas Department of Transportation (TxDOT)
Delivery Method: DBFOM (Revenue-Risk P3)
Construction Cost: 2.6 billion USD
Award - Completion: 2009 - September 2015
Consortium: LBJ Infrastructure Group
Developer: Cintra, Meridiam, Macquarie
DBJV: Ferrovial Construction, Webber
Lead Designers: Bridge farmer, Jansen & Spaans
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Design Management & Technical Oversight
Design Leadership & Multidisciplinary Coordination
Design Due Diligence & Compliance Review
ATCs Development
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Magnitvde’s Principal participated in the LBJ Express project while serving in a previous role prior to founding Magnitvde.
In this capacity, he served as Bid Design Engineer, supervising all aspects of the preliminary bid design and reporting directly to the Design Manager for the project.
He led the development of partial design concepts for multiple Alternative Technical Concepts (ATCs), coordinating design inputs across engineering disciplines and supporting compliance with TxDOT technical requirements.
The most significant ATC involved a cut-and-cantilever design innovation that eliminated the need for a double tunnel structure originally proposed for the managed lanes. This solution reduced construction complexity, minimized traffic disruptions, and accelerated project delivery.
The optimization reduced costs to less than one-third of the original tunnel option, ultimately resulting in the only bid within TxDOT’s available budget and approximately $1 billion lower than the next competing proposal.