US Highway 101/Peninsula Avenue Interchange Project


SCH Number
Lead Agency
California Department of Transportation, District 4 (DOT)
Document Title
US Highway 101/Peninsula Avenue Interchange Project
Document Type
NOP - Notice of Preparation of a Draft EIR
Present Land Use
State right-of-way, Service Commercial, High-Density Multifamily
Document Description
Caltrans, in cooperation with the City of San Mateo and the San Mateo County Transportation Authority (SMCTA), proposes to relocate the U.S. Highway 101 southbound on- and off-ramps from East Poplar Avenue to Peninsula Avenue creating a full interchange at Peninsula Avenue and Airport Boulevard and improve bicycle and pedestrian access on the existing Peninsula Avenue overcrossing. The project would improve the safety of the freeway on- and off-ramps and improve circulation within the project area. Two Build Alternatives are under consideration, including on- and off-ramps in a spread diamond configuration and on- and off-ramps in a tight diamond configuration along with a No-Build Alternative. Both Build Alternatives would require property acquisitions adjacent to U.S. Highway 101.

Contact Information

Zachary Gifford
Agency Name
Senior Environmental Planner
Contact Types
Lead/Public Agency


San Mateo
San Mateo
San Francisco Bay Area
Cross Streets
Peninsula Ave and US 101

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of Water Resources (DWR), California Highway Patrol (CHP), California Natural Resources Agency, California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), California Transportation Commission (CATC), Department of Toxic Substances Control, Office of Historic Preservation, San Francisco Bay Conservation and Development Commission (BCDC), State Water Resources Control Board, Division of Water Quality, California Native American Heritage Commission (NAHC)
State Reviewing Agency Comments
California Native American Heritage Commission (NAHC)
Development Types
Local Actions
No Local Action
Project Issues
Aesthetics, Air Quality, Biological Resources, Cumulative Effects, Economics/Jobs, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Noise, Population/Housing, Public Services, Recreation, Vegetation


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Notice of Completion [NOC] Transmittal form
State Comment Letters [Comments from state reviewing agencies]

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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