Interstate 405/Sepulveda Pass Widening

  • Client Los Angeles County Metropolitan Transportation Authority

Los Angeles, CA

Most recently, the I-405 Sepulveda Pass Widening project was the largest transportation project in the country. The project, encompassing over 10 miles of major highway, involved the addition of a High Occupancy Vehicle (HOV) commuter lane to the existing highway corridor. The widening occurred in the existing right-of-way and required the replacement of three major bridge overcrossing structures, the widening of 13 undercrossing structures, the installation of more than 80 retaining wall and sound wall structures, and other capacity enhancements and highway safety features.

LCI was responsible for the design and administrative coordination of the Visual Quality Management Advisory Team, engineering and architectural consultants, stakeholder groups, and affected agencies to develop the Visual Quality Management Concept Plan. The Plan was used to present measures that mitigate adverse visual impacts and provide guidance specific to the aesthetic design solutions for proposed bridge replacements, bridge widening, retaining and sound walls, slope and gore paving and other highway components. Additionally, LCI was responsible for the design and development of all highway and local roadway landscape components for the highway corridor.

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