The Interstate 35 (I-35) section between San Antonio and Austin is considered one of the most congested stretches of highway in the US Interstate Highway System. To improve safety and mobility, address anticipated growth in the region and reduce travel time for drivers, The Texas Department of Transportation (“TxDOT”) selected Alamo NEX Construction (a joint venture between Ferrovial Construction US Corp. and Webber, LLC) for the design, construction and maintenance of the I-35 NEX Central Project in Bexar and Guadalupe Counties.
This $1.5 Billion project consists of the design, construction and maintenance of approximately 9.5 miles of non-tolled improvements along I-35 including a portion of I-410 North and Loop 1604. The project scope includes 22 miles of elevated structures, 8 direct connectors in two major interchanges and the reconstruction of more than 5.5 miles of mainlanes and frontage roads. The project also includes other improvements such as at-grade widenings of the existing roadway, full project overlay, drainage infrastructure improvements and replacing or modifying existing structures including retaining walls and cross streets.
The I-35 NEX Central Project is located in a densely populated urban area, with high traffic volumes within a very limited right of way (ROW), heavy existing traffic and substantial presence of existing infrastructure. Constructing elevated lanes in this limited space, including numerous relocations of existing utilities, and keeping TxDOT’s roadway intelligent transportation systems (ITS) system online, all while minimizing disruption to the traveling public on an interstate roadway, are unique challenges for this project.
TxDOT, HNTB (as GEC) and Alamo NEX Construction have partnered to provide engineering solutions and construction techniques through a very innovative digital approach for the successful delivery of this world-class project to the Public.