US 101-Pensinsula Avenue Interchange Project
PROJECT WEBSITE: http://www.cityofsanmateo.org/Peninsula
All dates below are specific to the schedule of the Environmental Review and Permitting processes for this project.
ENVIRONMENTAL REVIEW AND PERMITTING STATUS
IN PROGRESS
ESTIMATED COMPLETION DATE OF ENVIRONMENTAL REVIEW AND PERMITTING
09/22/2025
ENVIRONMENTAL REVIEW AND PERMITTING PROCESSES
COMPLETED
SECTOR
Surface Transportation
CATEGORY
Project Category
DOT Projects
LEAD AGENCY
California, CalTrans
Description:
The California Department of Transportation (Caltrans) proposes the U.S. Highway 101/Peninsula Avenue Interchange Project in San Mateo County. 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.
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Permitting Timetable
The permitting timetable below displays data as reported by agencies. Dates for Environmental Review and Permitting processes (Actions) that are in 'Paused' or 'Planned' status are subject to change and are not indicative of a project's final schedule.
- For information about extensions, select an Action from the timetable below and select 'View Action Details' at the bottom of the page.
Action Information
For additional information, please select an Action from the Permitting Timetable above.
- Action:
- Responsible Agency:
- Bureau:
- Action Status:
- SHPO:
- Action Identifier:
- Action Outcome:
| Milestone | Original Target Date | Current Target Date | Milestone Complete |
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