Following a bicycle fatality on a notoriously dangerous overpass in San Carlos, city staff led a listening session for residents and bike safety advocates to propose near-term solutions to mitigate heightened concerns.
The death of Andrea Vallebueno, 31, on Nov. 16, 2024, reignited conversations about the dangerous Holly Street/Highway 101 overpass and the long-demanded infrastructure updates for cyclists and pedestrian safety.
“Andrea is why we’re here, but she’s not the only one who died on this interchange,” said Clem Tillier, a San Carlos resident, at the listening session Jan. 8. “As tragedies build up, we have to develop a sense of urgency to do something.”
Vallebueno’s partner, Faiz Surani of Palo Alto, shared remarks at the listening session, asking for any step forward in making the area safer to avoid further tragedy.
“As all of you guys know, Andrea was killed Nov. 16,” Surani said. “About a month before that, Andie and I had celebrated our one-year anniversary.”
Although Vallebueno was just visiting San Carlos and could not have known how dangerous the overpass was, Surani said. “For more than a decade, the city knew that something here was wrong” but “nothing happened.”
In Vallebueno’s honor, Surani asked to “just do something.”
“If we’re all back here months, years from now from the same thing, then I really don’t know what to say,” Surani said.
Since Nov. 16, bike safety advocates have kept the discussion going — hosting a ghost bike vigil Dec. 12, and raising the topic at various City Council meetings, and now city staff is trying to find a near-term solution.
Residents presented various ideas to staff such as shifting the bike lanes to a median path protected by concrete K-rails, or even fresh coats of paint and more signs to let drivers know they must be wary of bicyclists. Residents also proposed removing the second right-turn lane onto Holly Street from Industrial Boulevard, increasing corner island curbs and widening pedestrian crosswalks.
Tillier admitted after his proposed fix of a median bike path that he’s “just a guy with crayons,” and said it still remains up to the city to do something quickly.
The long-term goal continues to be the construction of a pedestrian bridge in an effort to connect downtown San Carlos with Redwood Shores, City Engineer Grace Le said. Currently, the highway serves as a significant barricade between the two. Cyclists, often avoiding Holly Street, travel to not-so-nearby overpasses instead.
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“Multiple people have crossed Holly Street once and then decided to never do it again — I am one of those people” resident Jeremiah Darais said.
The pedestrian bridge was considered “shovel ready” in 2019, and was coupled with its major counterpart project of reducing the clover highway interchange to a two loop interchange, Le said. However, the project has fallen in the priority lists of regional and local funding decisions.
The reason the project was ultimately killed is debated — Councilmember John Dugan said the Highway 101 widening project is to blame, while Karen Kuklin, a member of the San Mateo County Transportation Authority Community Advisory Committee, said the city is avoiding culpability.
Regardless, it will take significant time again to gain momentum on such a project, and a lot more money than it would have in 2019. Being less shovel-ready affects the project’s competitiveness for grant money, Le said.
Although the pedestrian bridge has only been considered alongside an interchange revamp, the bridge itself was estimated to cost $19 million in 2023, Assistant City Manager Nil Blackburn said.
“As time goes on, and it’s been five plus years, the project gets less and less shovel ready,” Le said. “The design needs updating, technically studies are outdated, permits need to be reapplied for, certifications recertified.”
Mike Swire, a member of organizations promoting bicycle safety, said that although it took a tragedy to get everyone in the room, he felt the listening session was an indication the city is serious about making some changes.
“I do this a lot, this doesn’t usually happen,” Swire said. “But this happened because [Blackburn] and the council saw somebody die and they stood up and they said we’re going to do something about it.”
The city will be meeting with technical assistants from SMCTA later this month, Blackburn said, to consider the feasibility of some of the proposed improvements, and will likely present findings to the City Council Feb. 8 at a strategic planning session.
“What I know, and what [Vallebueno] knew, is that when things don’t happen in government, it’s no one person’s fault,” Surani said. “When I want to be angry about this, I just try to think about that.”
For those interested in becoming involved or staying up to date, Blackburn said to visit cityofsancarlos.org/e-news to sign up for the appropriate newsletters.

(9) comments
Thank you for the wonderful coverage of this important issue, SMDJ. When people die because of unsafe streets, it deserves similar coverage to that of murders, fires, and other tragedies. Street violence is preventable if we design our streets for safety, not speed. We should hold our electeds accountable when they make decisions that cost lives.
Thanks for this story, much appreciated. The bicycle/pedestrian overpass project has been in development for well over a decade. The biggest obstacle was in 2019 when the project went to bid and the lowest contractor bid was 30% higher than the estimate. Unfortunately instead of taking action then, the can has been kicked down the road and costs continue to grow. Worth noting that recently new ped/bike overpasses have opened in Belmont (2011) and Palo Alto (2021), and a new 101 underpass just opened in Redwood City. How are these other cities able to get projects completed and San Carlos is still in the discussion phase?
Looking forward to continuing coverage. So tragic that another fatality is the impetus to do what should have been done years ago. Condolences to family, friends, and loved ones.
All the talk about the budget and money is very flawed of course.
C/CAG, MTC, JPL, Caltrans and whoever else was in charge of widening the highway MUST also be put in charge of providing the funding to cross these wider highways - that has to be a minimum ADA requirement. So this is on David Canepa, Diane Papan, Gina Papan, Alicia Aguirre, Rico E. Medina, Emily Beach, Davina Hurt, and the other county "leaders" that have given us the 101 highway expansion without the necessary ADA relevant infrastructure to go along with it.
No doubt it’s a multiagency issue, but the RFP for the actual construction was issued by the city of San Carlos. It’s the city that has not come up with the funds, although to be fair they have been applying (unsuccessfully) for grants. SMTCA has already provided millions to support prep work. As above, other peninsula towns have figured out how to get these projects done, San Carlos needs to do the same. Help from any other agency is always welcome.
- Why do cities have to come up with funds to repair a problem created by the county?
- why are upgrades to ADA-curbs regarded "pedestrian projects", when sidewalks only exist to protect us from cars?
- why do residents pay for sidewalks when the problem is created by the city providing free streets?
- why are crosswalks, traffic lights often paid out of pedestrian budgets, when they benefit drivers the most?
- why is "traffic calming", "Slow Streets", "Bicycle Boulevards" and similar nonsense paid of Active Transportation funds, when they do nothing for people on bicycles?
Who pays for what are simple accounting tricks. This makes sure nothing gets done for pedestrians and cyclists.
The law should be, if the county builds public car infrastructure, they need to pay for the required ADA parts of the project - and ADA relevant means pedestrian and bicycle infrastructure. That must be a part of the Environmental Impact Report and no project should be approved without it.
San Mateo's bike/ped bridge on Hillsdale was also scrapped due to the 101 widening. Belmont and PA did not have to fight Caltrans to make their bridges happen.
Yes the Hillsdale road bridge also stalled out, and unfortunately they have experienced similar outcomes: https://www.smdailyjournal.com/news/local/bicyclist-killed-on-hillsdale-overpass/article_5790192d-ea36-536c-a900-98408e999d6a.html
I am certainly not trying to defend Caltrans, just noting in the current system the cities are responsible for coordinating and funding these projects. Failure to move forward can have tragic consequences.
thanks for the article about a Caltrans vehicle running over a cyclists - which is sort of providing the necessary symbolism here.
There is absolutely no law preventing Caltrans from building pedestrian bridges over their highways. In fact there are several laws and internal policies for Caltrans to provide "Complete Streets" since 2006 and Governor Schwarzenegger signed the first of these laws.
We also have SMCTA and C/CAG - two county organizations in charge of distributing the money. Both organizations are full of county law- and policy makers, who are in charge of ALL residents - even those on foot or bicycles (only few people actually seem to know that).
San Carlos certainly has to be at the table to make architectural decisions and where and how the bridge can best be installed, but the money clearly has to come from C/CAG and SMCTA as a Holly Bridge street would benefit Belmont, San Carlos, Redwood City, Redwood Shores, and several county services like the county airport or the homeless shelter in the old Marriott hotel, etc. It's not a San Carlos projects - it's a county wide project. SMCTA, C/CAG and Caltrans are clearly in charge here to provide money. Emily Beach and Alicia Aguirre messed that one up.
Yes, i did think about pointing out the irony. I think there is agreement here - the entities responsible for the roads and their dangerous overpasses should be accountable and responsible for making ped/bike transit across those roads safe. I hope that happens in San Carlos.
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