Caltrans District 4 San Mateo County Newsletter

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SUMMMER 2025
Situated between the San Francisco Bay to the east and the Pacific Ocean to the west, San Mateo County boasts some of the most scenic roadways in the state. Hundreds of thousands of motorists, pedestrians, and cyclists depend on our highways and state routes every day..

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Adaptive Ramp Metering Comes to U.S. 101

Already in place in select East Bay locations, the Adaptive Ramp Metering (ARM) system has come to Caltrans District 4 in San Mateo County. This new system is designed to reduce congestion, shorten bottlenecks, and improve safety based on real-time conditions. ARM will smooth traffic patterns and reduce overall travel times for motorists.

The U.S. 101 ARM project starts in Brisbane and reaches south into Santa Clara County. It covers 142 ramp meters over 71 miles of highway. Phase I kicked off in April, and the entire stretch will be completed by October.

The system is set to run from 5 a.m. to 8 p.m. every day of the week. Weekend metering with the same hours of operations will begin in September at all ramps.

The Metering Lights Operations team is actively monitoring the system and fine tuning it, making regular adjustments during this learning period.

US 101 Highway Shield.

Caltrans Construction Teams Wins the John L. Martin Partnering Project of the Year Award for Woodside Improvements Project

The John L. Martin Partnered Project of the Year Award recognizes teams who distinguish themselves by implementing best practices and by fostering high trust and collaborative relationships in their construction projects. The award is bestowed every year by the International Partnering Institute (IPI). This year, the IPI recognized the Caltrans Woodside Improvements Project team with a Silver-level award. The IPI praised the team’s achievement, stating, “the Caltrans Woodside Improvements team has demonstrated commitment to the partnering process, achieved excellent results, and delivered an outstanding project.”

Gary Lai, Supervising Construction Engineer for Caltrans on the Woodside Improvements Project, said, “We are delighted with this recognition showcasing Caltrans’ commitment to partnering concepts and design techniques which helped us deliver a successful project benefiting the entire Woodside community.”

The team completed this project well ahead of its original schedule, delivering ADA compliance at many crosswalks, strategically staging paving work to minimize impacts to cyclists, and quickly repairing a failed culvert, all while maintaining strong communication with stakeholders and local residents.

Photo of the Woodside Improvements Project team celebrates their win of the John L. Martin Partnering Project of the Year Award.
The Woodside Improvements Project team celebrates their win!


A photo of the Surfer's beach Stairs with a Closed sign.

Construction continues at the Surfer’s Beach stairs.

Surfer’s Beach Stairs Under Repair in Half Moon Bay

Strong storm activity occurring over the past few years has kept Caltrans busy along the coast. Surfer’s Beach in Half Moon Bay is one of the hot spots where erosion caused the bike path and stairway to the beach to crumble. The bike path repairs are now finished, while the stair rebuild is anticipated to be complete by the end of the summer.


Map of where safety enhancement projects in four locations around the U.S. 101 / SR-92 interchange area will take place.

Local Access and Safety Enhancements Coming to U.S. 101 / SR-92 Interchange Area

Caltrans, in conjunction with our local partners, has begun a safety enhancement project in four locations around the U.S. 101 / SR-92 interchange area. Funded by approximately $45 million in local Measure A, regional, and federal funds, the project will reduce hazardous weaving movements and improve traffic flow. Ramps and merging areas are the focus of this short-term project, set to be completed in 2028.

Caltrans is partnering closely with the San Mateo County Transportation Authority and the City/County Association of Governments of San Mateo County to deliver the improvements while limiting impacts to drivers and residents.


Hillsdale Boulevard Overcrossing at El Camino Real Improvements Project

To improve pedestrian safety, construction will take place primarily at night with single lane closures to be implemented periodically throughout the summer. When construction requires pedestrian detours, wayfinding signs will be posted in multiple locations. Caltrans is working closely with the City of San Mateo and SamTrans to coordinate bus schedules and minimizing any disruptions to the traveling public.

A photo of the Hillsdale Mall at night.

View of the Hillsdale Mall at night.

To improve pedestrian safety, Caltrans is replacing bridge railing and constructing ADA (Americans with Disabilities) curb ramps on the Hillsdale bridge overcrossing at El Camino Real in San Mateo. The work enhances public access to the area, including to the Hillsdale Mall.

This project is scheduled for completion in July 2026.


Current 2025 San Mateo County Maintenance Highlights Overview. Maintenance data are current estimate at the time of editing, for more information contact the Caltrans San Mateo County Public Information Officer.


Setting the PACE: Public Affairs Customer Engagement Site is Now Live!

Banner image for Caltrans District 4 PACE (Public Affairs Customer Engagement). Besides the name, banner includes the Caltrans logo in an orange circle that has a headset around it..

District 4 is proud to announce the launch of our new Customer Service Request (CSR) platform. PACE, the Public Affairs Customer Engagement site, provides a regularly updated breakdown of services requested and rendered across the district.

  • The CSR dashboard aims to provide an overview of the responsiveness to maintenance services requested across the nine Bay Area counties.
  • The data represented as month-to-date falls within a rolling 30-day Service Level Agreement (SLA) and is updated weekly.
  • We strive to close 60% (or more) of all monthly service requests received via the CSR website portal.
  • For more information or to leave comments/suggestions, please contact D4CSLTEAM@dot.ca.gov.
  • To report a highway issue/problem, please submit a CSR ticket through the Customer Service Request Form.

Stay Connected with Caltrans

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πŸŒ‰Real-Time Highway Information
Caltrans QuickMap: quickmap.dot.ca.gov

πŸ“ž General Information
(510) 286-4444

πŸ‘€ Jeneane Crawford
Caltrans San Mateo County Public Information Officer

πŸ‘€ Pedro Quintana
Caltrans South Bay Branch Chief

πŸ“’Stay Connected

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A Caltrans team working on a safety project in the field.

A Caltrans team working on a safety project in the field.

The San Mateo County newsletter will be distributed on a regular schedule.