I-5 (I-405 to SR-55) Improvement Project
Construction Updates
Ensure you have the latest information on construction activities and project milestones delivered directly to your inbox. Use the Stay Informed form to subscribe to our project notifications, which will begin once construction is underway. If you require further assistance, please contact our community outreach team—we are ready to assist you.
Upcoming Events

OCTA's I-5 Improvement Project Community Outreach Team is hosting two community meetings on Wednesday, April 8 and Saturday, April 11.
These meetings are being held to allow the community to ask questions about the project.
Virtual
Wednesday, April 8
5:30 p.m. – 6:30 p.m.
Register at bit.ly/i-5projectmeeting
In-Person
Saturday, April 11
10:00 a.m. – 11:00 a.m.
Frontier Park 1400 Mitchell Ave., Tustin, CA 92780

Construction Closures & Detours
View the latest project closures and detours using the interactive map below.