SR-57 Truck Climbing Lane Project

SR-57 - Lambert Road to Tonner Canyon Road

Public Scoping Meeting

The project is currently in the preliminary environmental and engineering review phase, also known as Project Approval and Environmental Document (PA&ED). This phase includes a public scoping process to consider input from the public, agencies, and stakeholders on issues that should be addressed in the environmental document.

Community members are encouraged to participate in the environmental process by attending the virtual scoping meeting for the proposed State Route Truck Climbing Lane Project. The meeting will provide an opportunity to learn about the project, preliminary alternatives, and share comments or concerns. All comments received during the scoping period will become part of the public record and will be considered in development of the environmental document.

public scoping

Visit the Public Scoping page to view meeting details, registration information and how to submit public comments.

caltrans website

To learn more about the project, visit the Caltrans website.

Project Overview

The California Department of Transportation (Caltrans), in partnership with the Orange County Transportation Authority (OCTA), is proposing to improve traffic on northbound SR-57 between Lambert Road and the Orange/Los Angeles County line. The project proposes to extend the existing general-purpose lane as a truck-only climbing lane to reduce slowdowns caused by steep grades, heavy truck traffic, and a lane drop near the Lambert Road off-ramp.

The purpose of the project is to:

Improve operational efficiency of truck traffic on northbound SR-57 between Lambert Road and the Orange County/Los Angeles County line to accommodate regional goods movement.
In the northbound direction, extend the outside General Purpose (GP) lane beyond the existing lane drop at the Lambert Road off-ramp through the steep and sustained-grades to provide separation of truck traffic
Improve multimodal travel and use advanced technology, where feasible, to help manage current and future transportation needs.

The project is in the environmental review phase and is evaluating one No Build and two Build Alternatives.

Anticipated Schedule

MILESTONES	TIMEFRAMES
Environmental Phase Begins	September 2025
Public Scoping Meeting	September 2026
Draft Environmental Document (DED)	Early 2028
Final Environmental Document (FED)	Late 2028

*Schedule subject to change

Contact the Outreach Team

If you have any questions or would like to request information in another language, please contact the Outreach Team at (800) 724-0353 or email 57TruckClimbing@octa.net.

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