Laguna Canyon Road / Interstate 405 Overcrossing Widening Project

Laguna Canyon Road / Interstate 405 Overcrossing Widening Project

The proposed project includes widening the existing Laguna Canyon Road / I-405 overcrossing and completing the widening of the bridge approaches. This widening would add a median and two lanes of traffic west of the existing bridge. The widened bridge would have a curb-to-curb dimension of 24.4 meters (m) (80 feet [ft.]), which provides for two lanes of traffic in each direction, a bicycle lane and sidewalk on each side, and a 4.3 m (14 ft.) painted median. The overall bridge width would increase from 11.3 to 28.0 m (37 to 92 ft.) including 1.5 m (0.46 ft.) sidewalks. The project limits are from Limestone in the south to Pasteur in the north; these limits include the restriping of the existing roadway, which is necessary to the new widened facility to the existing roadway. The sidewalk and curb and gutter improvements would be limited to approximately 40 m (131 ft.) north of the bridge and approximately 10 m (33 ft.) south of the bridge. In order to provide safe facilities for pedestrians and bicyclists, chain-link fencing and overhead lighting would be added to both sides of the bridge. Additional elements of work would include seismic retrofit of the existing bridge and the relocation of Caltrans traffic surveillance cameras, currently mounted on the west side of the bridge, as well as the traffic detection loops located below the bridge in the I-405 traffic lanes to University Drive / Jeffrey Road bridge.

Irvine

Orange

Air Resources Board, Transportation Projects, California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), Department of Water Resources, Resources Agency, California Department of Transportation, District 12 (DOT)

California Department of Transportation, District 12 (DOT)

Transportation:Other (Overcrossing)

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Sewer Capacity, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildlife