Here’s what’s coming up to improve 6.5 miles of I-5 through Mission Viejo, Laguna Niguel, Laguna Hills, and Lake Forest. All three segments of the I-5 South County Improvements Project are under construction from SR-73 to El Toro Road, where transportation planners expect volumes to grow 25 percent by 2045. Construction on the I-5 Improvement Project is expected to be completed in late 2024. The following scheduled improvements are subject to change.
The last section of the Avery bridge was recenly demolished. Crews will begin pile driving in March, set girders in May and complete a bridge deck pour in June, with a late summer completion date. The on-and off-ramps are in the final construction stage with base, lighting and pavement work coming this spring.
The soundwall near Oso Creek will be finished in spring and all northbound and southbound ramps will be completely paved in preparation for the final traffic switch in late spring or early summer.
El Toro Road
Girders were placed in late December for the bridge improvements and new traffic signals and metal decking are coming soon. The El Toro Road undercrossing is scheduled to finish in April.
This $580 million freeway improvement project is funded by OC Go, also known as Measure M, Orange County’s half-cent sales tax for transportation improvements. Learn more about the project here.