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Peninsula Interchange Project

Peninsula AveProject Description
This project will ultimately relocate the US 101 southbound on- and off-ramps from East Poplar Avenue to Peninsula Avenue to eliminate the partial interchange condition and create a single, full access interchange at Peninsula Avenue and Airport Boulevard. This will result in an improvement to the safety and traffic operations of the southbound US 101 ramps and the intersection of East Poplar Avenue and North Amphlett Boulevard.

The project will provide improvements to the bicycle and pedestrian movements through the intersection of Peninsula Avenue and North Bayshore Boulevard. The project will also provide improvements to local streets to facilitate circulation and property access.  This is considered the long term solution for the safety issues at the Poplar on/off ramps.

The US-101/Peninsula Avenue Interchange Project received grant funding from the San Mateo Transportation Authority (TA) to complete the Caltrans documents, including the Project Study Report (PSR).  San Mateo is the sponsoring agency. The PSR-PDS (Project Development Support) phase of the project was completed in May 2015. The PA&ED (Project Approval & Environmental Document) phase of the project is currently underway and is expected to be completed in late 2018.  

Community Meetings

We need your input on the US 101/Peninsula Avenue Interchange Project. Attend either meeting.

  • May 16th at 6:30 p.m. Social Hall Burlingame Recreation Center, 850 Burlingame Avenue, Burlingame
  • May 17th at 6:30 p.m. San Mateo City Hall, 330 West 20th Avenue, San Mateo 


Project Documents



Project Contact Information

Gary Heap



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San Mateo City Hall – 330 West 20th Avenue, San Mateo, CA 94403

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