Please check back here to receive the latest up-to-date weekend ramp closure notifications and detour routes. To receive construction updates by text message, text “BuildNCC” to 313131. 

Nearby residents and businesses can expect daytime and overnight construction noise and lights, including Occupational Safety and Health Administration (OSHA) required vehicle back-up alarms. Crews will work to minimize noise and impacts to all nearby communities, and motorists will be detoured with signage and traffic controls. 

Soil Hauling along North Rios Avenue this Summer 

As part of the San Elijo Lagoon Restoration Project, Solana Beach residents are advised that Caltrans and SANDAG Build NCC restoration crews will conduct vehicle trips along North Rios Avenue to transport soil. These efforts help to boost planting efforts and lagoon restoration that will create new wildlife habitats. Equipment and site preparation will begin the week of July 26. Vehicle trips will begin the week of August 2, and continue Monday through Friday intermittently through September 2021 between the hours of 8 a.m.- 6 p.m. Please note, the Pole Trail will be open outside of hauling hours. 

Restoration crews will take all necessary steps to reduce noise and disruption when traveling north and south along North Rios Avenue.

Please see the work area map below:

Work Area Map

The San Elijo Lagoon Restoration Project is anticipated to be complete in early 2022. We thank you for your continued patience during construction! The San Elijo Lagoon Restoration Project is made possible through collaboration between Caltrans and SANDAG, in coordination with the Nature Collective and various resource agencies. Lagoon restoration will enhance wetland and upland areas, improve tidal flushing, and support the surrounding ecosystem for native wildlife species. During construction, limited access to lagoon trails is anticipated. For more information on lagoon trail closures, please visit

A total of $322 million in TransNet funding, the voter-approved half-cent sales tax administered by SANDAG, is allocated to the Build NCC package of highway, rail, environmental, and coastal access improvement projects. SANDAG leverages these funds with state and federal resources to improve the region’s transportation infrastructure. For more information on TransNet funded projects, visit



Motorists traveling along the Build NCC corridor – the eight-mile stretch of Interstate 5 (I-5) between Manchester Avenue in the City of Encinitas and Palomar Airport Road in the City of Carlsbad – are advised of a speed limit reduction to 55 mph in both the north and southbound directions. The speed limit reduction took effect on March 11, 2019, and will be in place until project completion in 2022.

The speed limit reduction within the highway work zone is necessary to ensure the safety of the traveling public, and construction and public safety professionals as they work to construct the new I-5 Carpool/High Occupancy Vehicle (HOV) lanes. Construction signage will alert drivers as they enter and exit the construction zone. Electronic speed feedback signs also will be present to inform the public of their speed in relation to the reduced speed limit. Additionally, the California Highway Patrol will be actively working to ensure motorists are driving safely by enforcing the new, posted speed limit. To learn more about the reduced speed limit, click here

To view previous Construction Alerts, please visit the Build NCC Construction Notices webpage.


Project Features

Highway Improvements
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Build NCC

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Highway, rail, environmental, and coastal access improvement projects are underway in the cities of Solana Beach, Encinitas, and Carlsbad as part of Build NCC, the first package of projects being constructed through the 40-year North Coast Corridor (NCC) Program.

Build NCC includes rail double tracking, extended Carpool/High Occupancy Vehicle (HOV) Lanes, new bike and pedestrian trails, and the restoration of the San Elijo Lagoon. These highway, rail, and lagoon improvements are being constructed simultaneously to minimize impacts to the lagoon and neighboring communities. 

Questions? Call our construction hotline at (844) NCC-0050 or email us at

To receive construction alerts via text message, text BuildNCC to 313131. 


Visit and click “Build NCC” to receive notices.
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Key Documents

Factsheet Factsheet Factsheet Factsheet Pre-Construction Open House Display BoardsSanta Fe/Encinitas ImprovementsI-5/Manchester Avenue Interchange ImprovementsSegment two open house display boards