Willow Road/U.S. 101 Interchange

Willow-Road-US-101-interchange-landscape-meeting---nextdoor
The City of Menlo Park is a project sponsor of the Caltrans project to update the interchange of U.S. 101 at Willow Road. This project was awarded to a contractor in February 2017, construction began in May 2017 and is expected to be fully completed in July 2019. The previous "full cloverleaf" style interchange has been replaced with a "partial cloverleaf" which eliminated the short merge weaves both on Willow Road and on the freeway. This creates a more efficient way for all modes of traffic, including bikes and pedestrians, to get across the freeway at Willow Road. The project replaced the existing interchange with a new, wider bridge; added sidewalks on both sides, bike lanes and protected bike paths along both sides; and added two signalized intersections. View a map of the Willow Road/U.S. 101 final interchange layout.

Landscaping phase


The City has hired a landscape architect to develop concept ideas for the landscaping of the interchange.

A community meeting was held on Thursday, September 26, to share concept ideas and gather community input.
The team will next present to the Environmental Quality Commission in fall 2019 and to the City Council in early 2020.

​Remaining items include


  • Minor traffic signal wiring work
  • Minor pavement and sidewalk repairs
  • Miscellaneous striping and signage throughout project area
  • Removal of all stored materials and construction trailers

Willows Neighborhood traffic changes 


To help alleviate additional congestion experienced in the neighborhoods, the following temporary turn restrictions were implemented in December 2017:
  • No right turns from Chester Street, Durham Street and O’Keefe Street to
    Willow Road, 3-7 p.m. weekdays (Except SamTrans and school buses)
  • No left turns from Woodland Avenue to Baywood Avenue, 3-7 p.m. weekdays
City Council will be receiving results of a before and after study of these turn restrictions to determine whether or not to remove them. To receive updates on when this item will be on the City Council agenda, please subscribe to Public Works Project Updates.
Last updated on October 4, 2019