BROWSE SOLUTIONS ABOUT PRESS CAREERS SEARCH GET IN TOUCH WATER Coastal, estuarine, riverine—precious resources, managed. PORTS Planning, design, technology—looking forward, cargo moved. TRANSPORTATION Vision meets design—the greater goods movement, connected. ENVIRONMENT Rising to the challenge—resilience, delivered. COMMERCIAL Analysis, planning, due diligence—speed of business, met. CREATIVE PEOPLE, PRACTICAL SOLUTIONS.® ABOUT HISTORY PRESS CAREERS SMALL BUSINESSES WATER PORTS TRANSPORTATION ENVIRONMENT COMMERCIAL +1 (562) 590-6500 INQUIRY@MOFFATTNICHOL.COM FOLLOW US ON SOCIAL MEDIA WORDS AND IMAGES © 2021 MOFFATT & NICHOL, ALL RIGHTS RESERVED TERMS OF USEPRIVACY POLICY

> BROWSE SOLUTIONS ABOUT PRESS CAREERS SEARCH GET IN TOUCH TRANSPORTATION ROADWAY AND CIVIL Orange County, CA United States I-405 IMPROVEMENT PROJECT SHARE PROJECT OWNER Orange County Transportation Authority SERVICES RENDERED Detailed design Engineer of Record Engineering Roadway design Structural design The I-405 corridor is generally recognized as the busiest road in the U.S. The I-405 Improvement Project widens the I-405 between SR-73 and I-605, improving 16 miles of I-405 between SR-73 in Costa Mesa and I-605 near the Los Angeles County line. The I-405 project’s objective is to reduce commute times for hundreds of thousands of motorists who travel the I-405 daily by adding general purpose and tolled express lanes; reconfiguring 12 interchanges to improve operational efficiency, reduce congestion-related accidents, and provide safety enhancements. Safety enhancements include reducing lane weaving for through traffic, proper shoulder widths, and striping. Pacific Infrastructure I-405 Designers, a design joint venture led by Moffatt & Nichol provided full engineering services for the 16-mile, $1.9 billion highway infrastructure project, including construction support and maintenance of traffic. Moffatt & Nichol is the lead design firm of the design joint venture as well as the designer-of-record for the freeway expansion and operational improvements. YOU MIGHT ALSO LIKE... MOUNT DORA, FL WEKIVA PARKWAY FLYOVER SEGMENT 3B EXPLORE PROJECT ORANGE COUNTY, FL STATE ROAD 429 WIDENING IMPROVEMENTS EXPLORE PROJECT NORTHWEST FLORIDA FDOT DISTRICT 3 GENERAL ENGINEERING CONTRACT EXPLORE PROJECT CREATIVE PEOPLE, PRACTICAL SOLUTIONS.® ABOUT HISTORY PRESS CAREERS SMALL BUSINESSES WATER PORTS TRANSPORTATION ENVIRONMENT COMMERCIAL +1 (562) 590-6500 INQUIRY@MOFFATTNICHOL.COM FOLLOW US ON SOCIAL MEDIA WORDS AND IMAGES © 2021 MOFFATT & NICHOL, ALL RIGHTS RESERVED TERMS OF USEPRIVACY POLICY