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SR-57 Northbound Project - Lambert Road to Tonner Canyon Road

The Orange Freeway (SR-57) from Lambert Road to Tonner Canyon Road is an important truck route and an integral part of Southern California’s freeway network.

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Project Overview

This project requires coordination between OCTA and Los Angeles Metro, two Caltrans Districts (7 and 12) and the cities in the project area, to study the addition of a truck climbing lane to enhance freeway operations and improve regional circulation of goods and services along this segment of northbound SR-57. This project length is approximately 2.5 miles.

Project Benefits

  • Improve traffic flow and increase throughput overall

  • Interchange and ramp improvements at Lambert Road (currently under construction)

  • Addition of a northbound truck climbing lane from Lambert Road to Tonner Canyon Road (second phase)

At a Glance

Affected Cities
Total Cost
Funding Sources
Approximately 2.5 miles Brea $121.5 million (Phase 1), To Be Determined (Phase 2) OC Go, State, Federal and Local Funds