Common misbeliefs are that concrete takes too long, costs too much, can’t be used on steep grades and super-elevations, and the ride quality will be poor. This is unique as many design engineers don’t think concrete can be used to construct ramps. “Caltrans has been a great partner throughout the project,” Stevenson continued, “supporting and encouraging the sustainable aspects of the project, along with establishing a close working relationship with the OCTA, and listening to the OC 405 team’s suggestions, such as our specific shutdown recommendations, which has allowed for more efficient and faster work, minimizing the impact on the public.”Įarly in the design process, the change was made to build the ramps with concrete instead of asphalt. “The OC 405 crews are doing an outstanding job performing the work seamlessly as a team,” Stevenson stated, “working with our great subs, all in conjunction with the designers and engineers. For the paving operations, construction crews are being led by Frank Stevenson, Pavement Manager at OC 405 Partners Joint Venture. Since being awarded the project in 2017, the OC 405 Joint Venture Team has worked to assemble top-notch crews to build the new roadway. Together, the JV design group avails the talent of a transportation-focused workforce of more than 3,000 professionals, with 76 design-build project completions and a thorough understanding of the local infrastructure environment through ongoing projects and relationships with Caltrans, OCTA, and local agencies. The design team is led by Pacific Infrastructure 405 Designers, a joint venture of California-based Moffat & Nichol with H.W. Astaldi is an international construction group that builds technologically complex infrastructure and transportation projects, with 90 successful design-build completions and more than 9,300 miles of highway and roadway projects. OHLA USA has constructed 103 design-build projects and 14 toll road projects that total more than 620 miles. OHLA has delivered more than 3,700 miles of roadways that safely and efficiently connect communities and key economic centers around the world. OC 405 Partners is the joint venture of contractors OHLA USA, Inc. Design-build accelerates project delivery, shortens the project duration, and gives the contractor flexibility to respond to changing conditions such as materials and workforce availability, weather, and other extenuating circumstances. The design-build method creates a partnership between the client, designer and the contractor, which reduces the risk of design errors and the need for redesigns.
The 405 Improvement Project was programmed to be design-build to provide OC 405 Partners Joint Venture with the ability to innovate throughout the process and improve the efficiency of the operation.Ĭonstruction photo courtesy of Frank Stevenson, Pavement Manager at OC 405 Partners Joint Venture. Here’s the breakdown on the funding – $1.316 billion from OC Go, $90 million from Caltrans, $46 million from Federal funding, and $629 million from a Federal Transportation Infrastructure Finance and Innovation Act (TIFIA) loan secured by the 405 Express Lanes future revenue. The total project cost is estimated at $2.08 billion, funded through a combination of local, state, and federal funds, with the 405 Express Lanes portion of the project to be paid for by those choosing to use the express lanes. When completed, I-405 will have a total of two new toll lanes with five to seven general purpose lanes. In addition, the project is adding the 405 Express Lanes, which incorporate the existing carpool lanes and add a new lane in each direction between SR-73 and I-605. The project features the addition of one regular lane in each direction between Euclid Street and I-605, reconfiguration of 12 interchanges and two major connectors, new concrete entrance and exit ramps, and the reconstruction of 22 bridges. An added bonus will be the ability to collect, analyze, and utilize data for systems performance along the I-405 corridor.
The project, which stretches through Orange County from Irvine on the south to Long Beach on the north, will extend the life expectancy of pavement, improve safety and efficiency for all modes of travelers, enhance traffic operation, and manage congestion. The project entails the widening the San Diego Freeway (I-405) between the SR-73 freeway in Costa Mesa and I-605 near the L.A. The Orange County Transportation Authority (OCTA) and Caltrans are also well aware of the traffic and road conditions, and for more than a decade have been carefully planning the 405 Improvement Project, which is currently midway to completion, being built by OC 405 Partners Joint Venture. Photo courtesy of Jeff Gritchen, Orange County Register. The 405, looking south, from Springdale Street in Westminster.
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