San Mateo has long been a city where traffic safety and urban density collide. With El Camino Real cutting through the heart of the city, major cross streets handling thousands of daily trips, and pedestrian traffic concentrated around schools, shopping centers, and transit hubs, certain intersections see a disproportionate share of the city's crashes. For residents, commuters, and pedestrians who use these roads every day, recognizing where the danger concentrates and why can be the difference between awareness and a life-altering San Mateo traffic accident.
Below are some intersections with the most significant crash histories in San Mateo, and some information on what you should do if you or someone you know is injured.
El Camino Real and Hillsdale Boulevard
This intersection is among the most hazardous in the city. El Camino Real is a state-controlled arterial that carries high-speed through traffic alongside pedestrian crossings, commercial driveways, and side street access. At Hillsdale Boulevard, that traffic mix becomes especially unpredictable.
In November 2024, a pedestrian was struck and killed by a vehicle at this intersection. The San Mateo Police Department confirmed the crash occurred just before 7 p.m. The death drew renewed attention to a corridor that advocates and residents have flagged for years as needing structural safety upgrades. Because El Camino Real falls under Caltrans jurisdiction rather than city control, safety improvements require coordination between local and state authorities, a process that has moved slowly despite documented crash patterns.
For pedestrians using this crossing, the risks are structural, not just behavioral. Turning conflicts, limited crossing visibility, and the speed differential between vehicles moving on El Camino Real and those entering from side streets all contribute to the danger.
El Camino Real and 17th Avenue
A second stretch of El Camino Real has its own troubling crash record. In January 2026, a woman was struck and killed in the crosswalk at El Camino Real and 17th Avenue after a vehicle turned north from Bovet Road onto South El Camino Real. San Mateo city officials acknowledged that this was not the first serious crash at that location and have continued pushing Caltrans for crosswalk protections.
The pattern at this intersection reflects a broader issue with turning movements across El Camino Real. Drivers making turns from side streets must negotiate multiple lanes of traffic while also accounting for pedestrians who may be mid-crossing. When those movements go wrong, the pedestrian who is already in the intersection has almost no protection.
North Delaware Street and State Street
Of all the intersections generating concern in San Mateo right now, the crossing at North Delaware Street and State Street may be the most urgent. This intersection is near San Mateo High School, making it a regular crossing point for students, families, and neighborhood residents.
North Delaware Street is on San Mateo County's designated high-injury network. Between 2014 and 2020, there were 18 reported crashes. Four of those were fatal. In March 2026, the intersection was the site of a crash that sent a father and his two young children to the hospital, with the father sustaining internal bleeding, broken ribs, a dislocated shoulder, and a leg injury requiring surgery. His eight-year-old son suffered skull fractures. The family was in the marked crosswalk when a truck struck them.
The issues at North Delaware and State Street involve visibility restrictions due to parking lanes and a lack of streetlights. This intersection illustrates what happens when a known hazard is not addressed quickly enough.
Peninsula Avenue and Delaware Street
One block south of the State Street intersection, Peninsula Avenue and Delaware Street has its own documented history. A San Mateo woman was killed at this crossing after being struck by a vehicle making a turn. Her death was cited by community members at the April 2026 City Hall rally as part of the same broader pattern of dangerous conditions on Delaware Street.
The city's Local Roadway Safety Plan identifies this intersection as a Tier 1 priority, ranking it seventh among the top ten highest-priority intersections in San Mateo for safety improvements. Planned upgrades include updated signal visibility hardware, left-turn signal arrows, high-visibility crosswalks, new pedestrian ramps, and curb extensions.
California Drive and Willow Road
Outside of the Delaware Street area, the intersections along California Drive and Willow Road are regularly cited as accident hotspots involving both drivers and pedestrians. This area sees high combined traffic volume from commuters, local residents, and bicyclists, with competing movement patterns that create frequent conflict points. The stretch along California Drive has appeared in multiple city traffic analyses as an area requiring ongoing attention.
What to Do After a Car Accident at a San Mateo Intersection
Knowing where risks increase is useful. Knowing what to do when a San Mateo intersection accident happens to you is essential. The steps you take in the minutes and days after a crash can significantly affect both your physical recovery and your ability to pursue compensation.
- Get medical attention, even if you feel okay. Adrenaline and shock can mask pain in the immediate aftermath of a collision. Some injuries, including internal trauma and concussions, do not produce obvious symptoms at first. A medical evaluation creates both a health baseline and a documented record that ties your injuries to the crash.
- Contact law enforcement and get a report number. A police report is one of the foundational documents in a San Mateo auto accident claim. Even in crashes that seem minor, having an official record matters if the other driver later disputes what happened or if injuries surface later.
- Document the scene if you are physically able. Photographs of the intersection, vehicle positions, traffic signals, crosswalk markings, and any visible hazards can become important evidence. If there are witnesses, get their contact information before they leave.
- Preserve all records. Keep copies of your medical bills, treatment notes, any communication with insurance adjusters, and records of missed work. This documentation forms the foundation of a claim if you are injured in a car accident in San Mateo.
Speak with an attorney before discussing the accidents with insurance companies or accepting any settlement. Insurance companies often move quickly after a crash with offers designed to resolve the claim before the full extent of injuries is understood. Our San Mateo personal injury lawyers can evaluate whether any offer reflects the actual value of your damages, including future medical costs, lost income, and pain and suffering.
Why Intersection Accidents Are Often More Complex Than They Appear
A San Mateo car accident at an intersection frequently involves questions of fault that are not immediately obvious. Multiple parties may share responsibility. A driver who ran a red light may have the primary fault, but so might a property owner whose overgrown vegetation blocked sight lines, or a government entity that failed to maintain a signal or crosswalk that was known to be defective.
California operates under a system of comparative fault, meaning that multiple parties can be assigned percentages of responsibility for a crash. Your ability to recover San Mateo accident compensation is not automatically eliminated if you were partially at fault, but the degree of fault assigned to each party directly affects the outcome.
Intersection crashes also generate time-sensitive evidence. Intersection camera footage, traffic signal timing records, and witness accounts can disappear or become difficult to obtain quickly. If you were injured at one of San Mateo's high-crash intersections, early action matters.
A Pattern Worth Watching
The crashes at North Delaware Street, El Camino Real, and other San Mateo intersections reflect a broader pattern playing out across Bay Area communities. The combination of aging infrastructure, high pedestrian volumes, and speeding drivers leads to preventable injuries year after year.
If you were hurt in a pedestrian accident at a San Mateo intersection or in a collision involving another vehicle, you may have a stronger case than you realize. If you're wondering what to do after a car accident in San Mateo, getting the right guidance early is one of the most important steps you can take.
If this sounds like your situation, the team at Galine, Frye, Fitting & Frangos may be able to help you understand your options and protect your right to recovery.
