I-5 Segment 2 PS&E (Yale Avenue to SR-55)

Heavy traffic and significant weaving movements are contributing to severe congestion on I-5. Advanced Civil Technologies is delivering highway widening and auxiliary lane improvements to significantly enhance mobility.

I-5 experiences severe traffic congestion which is anticipated to worsen. A contributing factor to the problem is the significant amount of weaving that occurs in this area, with many interchange ramps being utilized by over 1,000 vehicles hourly during morning and evening hours. Additionally, congestion is exacerbated by closely spaced interchanges with inadequate weaving distances. Improvements are necessary to correct highway deficiencies and prevent further degradation of mobility.

To address these issues, OCTA is proposing to widen I-5 between Yale Avenue and SR-55, a distance of approximately 4.5 miles. Proposed improvements include the addition of one new general-purpose lane and restriping limited access HOV lanes to provide continuous access. Additionally, weaving issues will be addressed by reestablishing existing auxiliary lanes, adding a new auxiliary lane in the northbound direction from Culver Drive to Jamboree Road, and adding limited length auxiliary lanes at the Culver Drive on-ramps. Advanced Civil Technologies is responsible for designing a portion of the drainage plans and contributing to the drainage report and SWDR. Additionally, our team is responsible for roadside signs, temporary and permanent ramp metering and lighting, TMP, specifications and cost estimates, and providing design support during construction.

Advanced Civil Technologies is working as part of a large collaborative team to deliver the project. We are developing the improvements to be consistent with other planned projects adjacent to I-5, requiring communication with those project teams. Additionally, our drainage staff are working closely with the grading team to ensure runoff will flow correctly from the roadway into the drainage facilities.