Caltrans District 12, in cooperation with the Orange County Transportation Authority, is proposing to improve traffic operations on SR 91 from PM 4.8 to PM R10.4, SR 57 from PM 15.6 to PM 16.1, and on SR 55 from PM 17.5 to PM R17.9 in the cities of Anaheim, Fullerton, Orange, and Placentia in Orange County, CA, a distance of approx 5.6 miles. The proposed improvements would include the SR-91 freeway mainline widening, primarily in the eastbound direction, and modifications to various interchanges, connectors, ramps, and intersections. Construction of the proposed project is expected to begin in 2026 and is anticipated to be completed in 2030, a duration of approx 3.5 years. The project is classified as category 4A, as described in Chapter 8 of the project development procedures manual.
Transportation:Other (freeway widening with improvements (5.6 mi))
Other ActionOther Action: transportation project
Aesthetic/VisualAir QualityArchaeologic-HistoricBiological ResourcesDrainage/AbsorptionFlood Plain/FloodingForest Land/Fire HazardGeologic/SeismicMineralsNoisePopulation/Housing BalancePublic ServicesRecreation/ParksSchools/UniversitiesSoil Erosion/Compaction/GradingSolid WasteToxic/HazardousTraffic/CirculationVegetationWater QualityWater SupplyWetland/RiparianGrowth InducingLand UseCumulative EffectsOtherOther Issues: community impacts, environmental justice, railroad, and energy
Air Resources BoardCalifornia Department of Parks and RecreationCalifornia Public Utilities CommissionCaltrans, District 12Department of ConservationDepartment of Toxic Substances ControlNative American Heritage CommissionOffice of Historic PreservationRegional Water Quality Control Board, Region 8Resources AgencySan Gabriel & Lower Los Angeles Rivers & Mountains ConservancyState Lands CommissionState Water Resources Control Board, Division of Drinking WaterDepartment of Fish and Wildlife, Region 5California Highway Patrol