I-405: Wilmington Avenue to Main Street Improvements

Improves safety, reduces congestion, and enhances walking and biking access.

Project Type

Mixed-Mode

Current Phase

Planning

Metro and Caltrans are studying improvements to a heavily traveled 3-mile segment of the I-405 through Carson. The project explores ways to reduce congestion, improve safety, and enhance access for pedestrians and bicyclists—without expanding general-purpose lanes or permanently acquiring property.

Status Update

JOIN US FOR PUBLIC HEARINGS

Metro is pleased to announce it has released a joint Draft Environmental Impact Report (EIR) and Environmental Assessment (EA) for the I-405 Wilmington Av to Main St Improvements Project and is hosting a series of upcoming public hearings.

Meeting #1
Thursday, August 20, 2026, 6–7:30pm
Carson Event Center
801 Carson St, Carson, CA 90745

Meeting #2
Tuesday, August 25, 2026, 6–7:30pm
Carson Event Center
801 Carson St, Carson, CA 90745

To learn more, please see the following project related documents:

Draft EIR/EA: Link
Draft EIR/EA Appendices: Link

Notice of Availability (NOA)
English: Link
Spanish: Link
Tagalog: Link

Executive Summary
English: Link
Spanish: Link
Tagalog: Link

Submit a Comment
The formal public comment period ends on Monday, September 21, 2026. Comments may be submitted via:

U.S. Mail:
Rocky Rojas, Environmental Scientist
Caltrans, Division of Environmental Planning
100 South Main Street, MS 16A
Los Angeles, CA 90012

Project Email: wilmington@metro.net

Planning and Community Insights

Learn

See What's Being Considered

Explore for detailed insights and proposed improvements.

English: Link
Spanish: Link
Tagalog: Link

Read the Fact Sheet (English)

Engage

Explore the Corridor

View an interactive map of the area.

View Story Map

Take Action

Attend a Public Hearing

Stay informed by attending our upcoming public hearings in August. 

Frequently Asked Questions

Why was this corridor selected?

This section of I-405 carries more than 300,000 vehicles daily, with high congestion and collision rates, making it a priority for improvement.

What are TSM and TDM strategies?

Transportation Systems and Demand Management strategies improve efficiency without adding lanes. Examples include ramp meters, signal coordination, traffic monitoring, and driver information systems.

What are auxiliary lanes?

Auxiliary lanes help drivers merge or exit more safely by providing additional space between on- and off-ramps.

What is the environmental process?

Metro is conducting environmental studies under CEQA and NEPA, including public input, technical analysis, and preparation of draft and final reports.

What environmental studies are included?

Studies cover air quality, noise, traffic, biology, water, and more, with mitigation strategies proposed as needed.

What are Complete Streets?

Complete Streets improvements enhance access and safety for all users, including new sidewalks, bike facilities, lighting, crosswalks, and ADA upgrades.

Will any property be acquired?

The project does not propose permanent property acquisitions. Temporary construction easements may be needed and are under review.

When will the Environmental Document be released?

The project team anticipates releasing the Draft Environmental Impact Report (DEIR) by summer 2026.