Willow Road/U.S. 101 Interchange

Willow Road - US 101 Interchange
The City of Menlo Park is a project sponsor of the Caltrans project to update the interchange of U.S. 101 at Willow Road. The current "full cloverleaf" style interchange will be replaced with a "partial cloverleaf" which will eliminate the short merge weaves both on Willow Road and on the freeway and will create a more efficient way for all modes of traffic, including bikes and pedestrians, to get across the freeway at Willow Road. The project will replace the existing interchange with a new, wider bridge; add sidewalks on both sides, bike lanes on both sides and protected bike paths on both sides; and add two signalized intersections. The final version of the new interchange layout is available for review.

Current status

This project was awarded to a contractor in February 2017 and construction began in May 2017 and is expected to continue for approximately 2 years. 

New Traffic Signals and Ramp Locations

This project recently added two temporary traffic signals and changed the lane layout at each of the ramp locations for the next phase of construction. In the interchange, new pavement paint and additional signs will be added soon to help clarify the temporary changes and better direct traffic during construction. The traffic signals along Willow Road from Durham Street to Newbridge Street will also be coordinated so that the traffic can flow through the interchange more smoothly. 

Willows Neighborhood Traffic Changes

These changes have created additional congestion in the surrounding neighborhoods, so on Tuesday, November 14, 2017, City Council directed staff to install “No Thru Traffic” signs throughout the neighborhood to address this additional traffic. The next day City staff installed a number of yellow advisory signs that were already on hand at key entry points to the neighborhood. White regulatory signs have been ordered and will be installed shortly. Locations of the signs will be adjusted as needed. The “No Thru Traffic” signs are intended to discourage cut-through traffic. Electronic signs will also be added at Middlefield Road near Willow Road and along Bayfront Expressway to advise drivers of the construction and encourage them to use alternate routes. City staff is in the process of looking at other options for City Council to consider at an upcoming meeting.

Current construction activities

For more detailed construction information, please refer to the weekly construction news updates

Dates Times  Impacted area Activity  Traffic impacts
Starting November 6, 2017 24 hours per day U.S. 101 Ramps and Willow Road intersections Change in ramp layout and added temporary traffic signals New traffic signals will be turned on; Both SB ramps will be on south side; Both NB will be on the north side of Willow Road
July 24, 2017 - Summer 2018 24 hours per day Willow Road between Bay Road and Newbridge Construction of Willow bridge, no bicycles or pedestrians allowed Bicycle and Pedestrian shuttle provided and Ringwood pedestrian bridge available as detour. Shuttle map
July 2017 - October 2017 Hours vary Willow Road East of 101, Pierce Road, E. Bayshore Road, Bay Road, Willow Road at Bay Road, Grayson Court Water line installations Majority of work is outside of roadways, but some shoulder and lane closures may occur
Last updated on November 17, 2017