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

In November 2017, the project added two temporary traffic signals and changed the lane layout at each of the ramp locations for the current phase of construction. The traffic signals along Willow Road from Durham Street to Newbridge Street have been coordinated and are being monitored and adjusted as needed so that the traffic can flow through the interchange more smoothly. 

Willows Neighborhood Traffic Changes

To help alleviate additional congestion experienced in the neighborhoods, the following temporary turn restrictions were implemented in Decemmber 2017:
    • No right turns from Chester, Durham and O’Keefe to Willow Road, 3-7pm weekdays(Except SamTrans and school buses)
  • No left turns from Woodland to Baywood, 3-7pm weekdays

These turn restrictions will be enforced for all vehicles, so both local and regional traffic will need to make adjustments to their travel routes during these weekday afternoon hours. Staff is performing on-going observations and monitoring as well as collecting observations from the community to determine the effectiveness of these changes.

Click on map to zoom in Map - Willows Traffic Funiture-Phase 1

Current construction activities

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

Dates Times  Impacted area Activity  Traffic impacts
March - April 2018  7am-6pm M-F Median and both sides of freeway Installation of new bridge structure columns and walls  Periodic freeway lanes closures may occur during non-peak hours 
March - May 2018  7am-6pm M-F Quadrant closest to East Palo Alto Grading, earth moving and concrete work for drainage systems  Possible noise impacts
January 2- mid-March, 2018 8am-5pm M-F Sound walls areas and outside areas of Willow bridge Pile driving for foundations of new sound walls and demolition of existing Willow bridge No traffic impacts, but noise and vibration impacts may be experienced by adjacent residential areas
December 18, 2017 through TBD  3-7 pm M-F Chester, Durham & O'Keefe at Willow  No right turns Right turns will be restricted every weekday from 3-7 pm for all vehicles
December 18, 2017 through TBD  3-7 pm M-F Woodland to Baywood  No left turns Left turns will be restricted every weekday from 3-7 for all vehicles 
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 - Fall 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
Last updated on March 8, 2018