I-405: Wilmington Avenue to Main Street Improvements

Improving safety, mobility, and multimodal access on a critical stretch of the I-405 through Carson and the South Bay

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.

Read the Fact Sheet

Documents

Folder

Name

Type

Name of the document if it’s long

Description of folder if the description is too long then it will

Name of the document if it’s long

Description of folder if the description is too long then it will

1.25GB

Download

Name of the document if it’s long

Description of folder if the description is too long then it will

Open Link

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.

Get Involved

Help shape this project for good. We want to hear from you:

Contact the Project Team
Get Project Updates

Got questions or ideas? Our project team is here to listen.

By connecting with us, you bring valuable insights to the table, helping create a Metro that truly reflects LA’s unique spirit.

Email Us 310.854.3196

Receive our project emails!

Register to receive detailed updates and essential information about our projects directly to your inbox. Stay informed and engaged as we progress, ensuring you have all the latest developments and key insights at your fingertips.

Safety and Security Hub

I-405: Wilmington Avenue to Main Street Improvements

Documents

Frequently Asked Questions

Get Involved

Got questions or ideas? Our project team is here to listen.

Receive our project emails!