Westbound SR-91 Improvement Project
Delivering safer, smoother travel on SR-91 through Artesia and Cerritos.

See the Latest Updates
Review highlights from past community meetings that helped shape the project’s direction.
Explore Project Reports
Dive into the environmental document and technical reports guiding the project design.
Frequently Asked Questions
Why are these improvements needed?
The project area suffers from serious congestion and accident rates above the statewide average, especially near the I-605 connector ramps. The current layout lacks the capacity to handle growing demand and safe merging distances.
What will the project add or change?
The project will add one mixed-flow lane on westbound SR-91, convert interchange loops to more efficient designs, improve connector ramps to I-605, and enhance pedestrian and bike access near interchanges.
What areas will benefit from the project?
Artesia and Cerritos residents, businesses, and commuters using SR-91 and I-605 will benefit through shorter travel times, improved safety, and more reliable traffic flow.
What is the Preferred Alternative?
The selected design includes a reduced-width lane option and reconfiguration of ramps at Pioneer Boulevard to improve safety and reduce property impacts.
How does this project affect bike and pedestrian access?
New sidewalks and potential bike lanes will be added where none currently exist, especially near Bloomfield Avenue and Pioneer Boulevard.
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