What is Build NCC?

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It’s a combination of transportation improvements, environmental protection, and coastal access projects in the cities of Solana Beach, Encinitas, and Carlsbad being constructed by Caltrans and SANDAG. Build NCC is the first phase of the 40-year North Coast Corridor (NCC) Program.

What has Build NCC constructed?

  • San Elijo Activity Hub Park & Ride
  • 13 miles of Carpool/HOV Lanes on I-5 from Lomas Santa Fe Drive in Solana Beach to SR 78 in the City of Oceanside
  • 4 new sound walls throughout the project limits
  • 7 miles of bike and pedestrian paths in Encinitas
  • 1 new vista point on southbound I-5, just south of Birmingham Drive
  • 1.5 miles of rail double-tracking
  • 154 acres of restored wetlands in the San Elijo Lagoon
  • 400,000+ cubic yards of sand added to local beaches

What is Build NCC working on now?

Build NCC construction crews are working on construction of a new auxiliary lanes from Poinsettia Lane to Palomar Airport Road on northbound I-5, and from Cannon Road to Poinsettia Lane on southbound I-5. Crews also are restoring 84 acres of the San Dieguito Lagoon, and working on slope repair and other rehabilitation at the Agua Hedionda Lagoon.

What is next for Build NCC?

Starting in Fall 2023, Build NCC crews will begin construction of bike and pedestrian improvements at the I-5 intersections with Chestnut Avenue and Palomar Airport Road in the City of Carlsbad. Crews will also begin construction of a new sound wall on northbound I-5, near Tamarack Avenue.

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

To receive construction alerts via text message, text BuildNCC to (760) 454-0077. 


Orange Striping Pilot Program Resumes on I-5 in the City of Carlsbad  

Caltrans and SANDAG Build NCC crews have restriped the orange contrasted lane striping on I-5 between Palomar Airport Road in the City of Carlsbad and State Route 78 (SR 78) in the City of Oceanside.

The orange contrasted lane striping will remain in active construction zones until project completion in early 2025.   

The orange striping is meant to draw attention to the work zone, reinforce the 55-mph speed limit reduction, and improve both driver and construction worker safety. The orange striping can be found in the stated limits below: 

Orange Striping Returns

DRIVE 55 on I-5!

Motorists traveling along I-5 in North County between Poinsettia Lane in the City of Carlsbad and State Route 78 (SR 78) in the City of Oceanside – are advised of a speed limit reduction to 55 mph in both north and southbound directions. The speed limit reduction will be in place until project completion in 2025.

This speed limit reduction within the highway work zone is necessary to ensure the safety of the traveling public, and construction and public safety professionals. Construction signage will alert drivers as they enter and exit the construction zone. Additionally, the California Highway Patrol will be actively working to ensure motorists are driving safely by enforcing the new, posted speed limit. Please note fines are doubled in work zones.

To view weekly Construction Alerts, please visit our Construction Notices webpage.


Key Documents

Factsheet Factsheet Factsheet Factsheet Santa Fe/Encinitas ImprovementsI-5/Manchester Avenue Interchange Improvements