Segment 1: Orangethorpe Avenue to Lambert Road

The SR-57 is an important truck route and integral part of Southern California's freeway network. Currently, drivers experience substantial traffic congestion during peak afternoon hours. In an effort to improve traffic flow, OCTA, in cooperation with the Caltrans District 12, is adding a northbound lane along a five-mile section of the freeway in Orange County between Orangethorpe Avenue in Placentia to Lambert Road in Brea. Improvements to this five-mile stretch include the addition of one general-purpose lane along with merging lanes, standardization of existing lane widths and shoulders, and reconfiguration of certain on-ramps and off-ramps. 

Segment 2: Katella Avenue to Lincoln Avenue

Improvements to this three-mile stretch include adding one northbound general purpose lane from the Katella off-ramp to the Lincoln on-ramp. Also included is additional widening to bring the general purpose lane width, the high occupancy vehicle (HOV) lane width, and the inside shoulder width into conformance with Caltrans design standards.

Schedule Overview

Key Objectives

• Reduce traffic congestion and delays
• Increase traffic flow and safety for the 144,000 to 158,000 vehicles projected to travel this section of the freeway daily
• Facilitate the flow of goods and services via the SR-57
• Achieve a major component of the Measure M2 Freeway Improvement Plan
• Conform to state, regional and local plans and policies 

Project Timeline

Orangethorpe to Lambert 

Katella to Lincoln  

Project Funding Sources

The total cost of the Orangethorpe to Lambert project is $102 million. Project funding sources include the state Proposition 1B: Corridor Mobility Improvement Account Program funds and Orange County's Measure M2 – the half-cent sales tax for transportation improvements approved in 2006. On Nov. 7, 2006, county residents also approved Measure M2 (M2) for another 30 years to 2041. An M2 Early Action Plan was implemented in 2007 and allows OCTA to advance the implementation of M2 projects – such as the SR-57 widening – before 2011. 

The estimated total cost of the Katella to Lincoln project is $45 million. Project funding sources include the state Proposition 1B: Corridor Mobility Improvement Account Program and Orange County's Measure M2 – the half-cent sales tax for transportation improvements approved by voters in 2006. 

Keep Me Informed

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