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.
California Department of Transportation, District 12
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Parks and Recreation, California Department of Transportation, District 12 (DOT), California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, Resources Agency, San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC), State Water Resources Control Board, Division of Drinking Water, California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Highway Patrol
State Reviewing Agency Comments
California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Highway Patrol
Transportation:Other (freeway widening with improvements (5.6 mi))
Aesthetics, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire, community impacts, environmental justice, railroad, and energy
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