A malfunctioning traffic signal removes the one piece of information every driver relies on to safely enter an intersection, and when it fails, the fault can rest with more than one party. Depending on why the signal stopped working, liability can fall on the government agency that owns the equipment, the manufacturer or contractor who built or serviced it, another driver who failed to react safely, or some combination of all three. Sorting out who is responsible requires a careful look at maintenance records, the cause of the malfunction, and the conduct of everyone who passed through the intersection before your crash. Because signal outages tend to happen without warning, the resulting crashes are often high speed, multi vehicle collisions that leave more than one driver disputing what actually happened.
If you were hurt in a crash caused by a faulty traffic signal, the path to compensation is far more complicated than in a standard car accident claim. At Younglove Law Group, our car accident attorneys have extensive experience investigating these cases, identifying the parties at fault, and fighting to recover the compensation our clients deserve.
Why Intersection Safety Matters in California
Intersections are among the most dangerous points on any roadway, and a malfunctioning signal only raises the stakes. According to the Federal Highway Administration, roughly one-quarter of all traffic fatalities and about half of all traffic injuries in the United States occur at intersections, a pattern driven by the sheer number of vehicles, pedestrians, and cyclists crossing paths at the same location. When the signal that is supposed to organize that traffic goes dark, flashes erratically, or shows conflicting signals to different lanes, an already high-risk location becomes significantly more dangerous. Drivers who are used to a predictable green, yellow, and red cycle often take a few extra seconds to recognize that a signal has failed, and that hesitation, combined with another driver’s confusion or a driver who runs the intersection out of habit, is frequently what turns a malfunction into a collision. Understanding why signals fail, and who is responsible for keeping them working, is the first step in building a strong claim.
What Causes a Traffic Signal to Malfunction?
Traffic signals can fail for many reasons, and the cause often points directly to the party who may be responsible for your crash. Severe weather, including lightning strikes and heavy storms, can knock out power to a signal or damage its internal components. Vandalism, a vehicle collision with the signal pole, or a power outage affecting an entire block can each cut a signal dark without warning. Aging wiring, a worn timing relay, or a sensor that was never calibrated correctly can also cause a signal to display the wrong color, skip a phase, or give two directions a green light at the same time. Overgrown vegetation or debris covering an inductive loop or camera based detector can prevent a signal from recognizing that a car is waiting, causing it to skip a direction of traffic entirely, and a software or timing error introduced during an upgrade can create the same problem without any visible sign of damage. Identifying which of these causes led to your crash often requires pulling maintenance and repair records for the specific intersection, which is a step our firm takes early in every traffic signal investigation.
What Are Drivers Required to Do When a Signal Malfunctions?
California law requires drivers to treat a completely dark or non-functioning signal as a four-way stop, meaning every driver must come to a complete stop and yield to whoever arrived first or to the vehicle on the right when two drivers arrive at the same time. A signal flashing red in all directions carries the same requirement, while a signal flashing yellow calls for caution rather than a full stop, since a flashing yellow generally allows a driver to proceed after slowing down and checking that the intersection is clear. Pedestrians face similar uncertainty when a crosswalk signal fails, and drivers still owe them a duty to watch for foot traffic entering the intersection. Confusion about these rules is common, and it is often a direct contributing cause of collisions at malfunctioning intersections, whether the person injured was another driver, a cyclist, or someone hit by a car while walking in a crosswalk.
Types of Accidents Caused by Malfunctioning Traffic Signals
The type of crash a malfunctioning signal produces often depends on exactly how it failed. A signal that goes completely dark tends to create broadside or T-bone collisions when one or both drivers assume they still have the right-of-way, while a signal that changes unexpectedly or holds a stale green light can lead to rear-end accidents as a trailing driver reacts too late to a sudden stop. A signal that displays conflicting colors to crossing lanes at the same time can also put pedestrians and cyclists at serious risk, since they may step off the curb believing they have a protected crossing when a vehicle is still moving through the intersection. Because the injuries in these crashes often result from higher speeds or an unexpected point of impact, they can be more severe than a typical rear-end or lane-change collision, which makes an early medical evaluation and a thorough investigation especially important. Multi vehicle pileups are also more common at malfunctioning intersections than at a typical crash site, since several cars may enter the intersection from different directions within the same few seconds, each assuming their own right-of-way is protected.
How Signal Timing and Red Light Camera Data Can Support Your Claim
Many California intersections use red light cameras, loop detectors, or centralized signal controllers that log when a light changed and how long each phase lasted. When these records are available, they can help confirm whether a signal was cycling correctly, holding an unusually long red or green phase, or skipping a direction of traffic entirely at the time of your crash. This data can also corroborate or contradict a driver’s account of what color the signal displayed, which is often the central dispute in these cases. Because footage and timing logs are not always preserved for long, our attorneys move quickly to request this evidence from the responsible city, county, or state agency before it is deleted or overwritten.
Who Is Responsible for Traffic Signal Maintenance?
Traffic signals are typically owned and maintained by a government agency. In California, that responsibility can fall on a city, a county, or the state’s Department of Transportation, depending on which roadway the signal controls. A signal on a city street is usually maintained by that city’s public works or traffic engineering department, a signal at a county road intersection typically falls to the county, and a signal on a state highway or freeway on-ramp generally falls under Caltrans. When a signal malfunctions and causes an accident, the agency responsible for its upkeep may be held liable if it failed to keep the signal in safe working condition.
Establishing Government Liability for a Signal Failure
Holding a government entity accountable is not automatic. To establish liability, you generally need to show that the responsible agency had notice of the malfunction, either actual notice, meaning someone reported it, or constructive notice, meaning the problem had existed long enough that a reasonable agency should have discovered it. You must also show that the agency failed to act within a reasonable time to address the hazard. This requires reviewing maintenance logs, inspection records, and prior complaints about the signal.
Filing a claim against a government entity in California also comes with strict procedural requirements that do not apply to a standard personal injury claim. You typically have only six months from the date of your injury to file a government tort claim, and missing this deadline can permanently bar you from pursuing compensation. Our guide on suing government entities after an accident in California covers this process in more detail, and speaking with an injury claims attorney as soon as possible gives you the best chance of meeting every deadline.
When Private Parties Share Liability
Government agencies are not always the only parties responsible for a faulty traffic signal. In some cases, private companies, contractors, or even other drivers may also bear responsibility for your crash.
Manufacturers and Installation Contractors
If a signal malfunction was caused by a defect in the equipment itself, the manufacturer of that equipment may face a product liability claim. Similarly, if a contractor installed or repaired the signal and did so negligently, that contractor could also be held accountable. Identifying whether the failure was due to poor maintenance, defective parts, or improper installation is a critical step in determining who is at fault. This often requires comparing the equipment’s design specifications against the specific way it failed, along with reviewing any recall notices or complaint histories tied to the same model of signal controller or sensor.
Utility Companies and Construction Crews
Traffic signals depend on a steady power supply and underground wiring that often runs near active construction sites. When a utility company’s work on nearby power lines interrupts a signal’s electricity, or a construction crew damages buried wiring or a signal’s control box during excavation, that company may share responsibility for the resulting crash. These cases can be harder to identify because the connection between construction activity and a signal failure is not always obvious right away, which makes an early investigation particularly valuable.
Other Drivers at the Scene
Even when a signal malfunctions, other drivers retain a duty to operate their vehicles safely. If another driver ran through the intersection without yielding and struck your vehicle, that driver may also share liability for your injuries. California’s pure comparative fault rule means that multiple parties can be assigned a percentage of fault, and each may owe compensation proportional to their share of responsibility. This can matter a great deal in a signal malfunction case, since a jury or insurance adjuster may otherwise be tempted to place all of the blame on the broken equipment rather than on a driver who failed to slow down and check the intersection.
Common Driver Negligence at Malfunctioning Intersections
Even with a malfunctioning signal, most intersection accidents still involve some degree of driver error. Insurance companies frequently try to blame the malfunction alone, but a careful review of the crash often reveals that negligent driving contributed to the outcome. Some of the most common examples our attorneys encounter include the following.
- Failing to stop at a dark or all-way flashing red signal before entering the intersection.
- Proceeding out of turn instead of yielding to the vehicle that arrived first or to traffic on the right.
- Distracted driving, including phone use, that keeps a driver from noticing the signal was not working.
- Excessive speed through an intersection that required extra caution because of the malfunction.
When a driver’s negligence combines with a government agency’s failure to maintain the signal, or with a manufacturer’s defective product, more than one party can end up sharing liability for the same crash. Identifying every contributing cause, including patterns tied to distracted driving accidents, can also mean access to multiple sources of insurance coverage. Our attorneys typically request dashcam footage, cell phone records, and any citations issued at the scene to help determine whether a driver’s own conduct played a role alongside the signal malfunction.
What Compensation Can You Recover After a Traffic Signal Accident?
Accidents caused by faulty traffic signals often result in serious injuries. Depending on the circumstances of your collision, you may be entitled to recover damages for medical expenses, future medical care, lost wages, lost earning capacity, property damage, and pain and suffering. If the crash caused a lasting impairment, compensation may also account for the reduced quality of life that comes with a long-term or permanent injury. In cases involving government negligence, the amount of compensation available can be subject to certain limitations under California law, which makes it even more valuable to have an attorney calculate the full scope of your damages from the start rather than accepting an early settlement offer.
When building your claim, our attorneys gather key evidence that includes surveillance footage from nearby businesses or traffic cameras, public maintenance records, witness statements, and crash reconstruction analysis. Acting quickly matters, since signal malfunction evidence can disappear fast and government claims carry tight filing deadlines.
Contact Younglove Law Group After a Traffic Signal Accident
Traffic signal malfunction cases require a level of investigative depth that goes well beyond a typical collision claim, since proving fault often means requesting records from a government agency, a signal manufacturer, and one or more drivers all at once. Younglove Law Group has recovered millions of dollars for accident victims throughout California, and our attorneys, led by founding attorney Phillip Younglove, bring more than 20 years of combined experience to every case they handle.
When government negligence or defective equipment puts you at risk, you deserve a legal team that will dig into the details, meet every deadline, and pursue every liable party on your behalf. Our firm works on a contingency fee basis, meaning you owe us nothing unless we recover compensation for you. If you were injured in a crash involving a faulty signal, contact us today to schedule a free consultation and let our attorneys review the details of what happened.
Frequently Asked Questions About Faulty Traffic Signal Accidents
What should I do immediately after an accident at a malfunctioning traffic signal?
Call 911 to report the crash and request medical attention if needed, since a police report documenting a malfunctioning signal can become important evidence. If you are able, take photos of the signal, the intersection, and any visible damage before conditions change. Note the exact time, since signal timing logs and maintenance records are tied to specific dates. Exchange information with any other drivers involved and avoid discussing fault at the scene. Contacting an attorney early helps preserve evidence that a responsible agency or contractor might otherwise be able to control.
How long do I have to file a claim if a government agency is responsible for a broken traffic signal in California?
California generally requires injury claims against a government entity to be filed within six months of the date of the accident, which is far shorter than the deadline that typically applies to claims against private individuals or companies. Missing this deadline can permanently prevent you from recovering compensation from the responsible agency, even if the agency’s negligence clearly contributed to your crash. Because this timeline moves quickly, speaking with an attorney as soon as possible after a signal related accident gives you the best chance of meeting every requirement.
Can I still recover compensation if another driver ran the intersection because the signal was flashing red or dark?
Yes, in many cases. Other drivers retain a duty to treat a dark or all-way flashing red signal as a four-way stop, and a driver who fails to stop or yield at a malfunctioning intersection can be held liable for a resulting crash. This does not eliminate the possibility that a government agency, manufacturer, or contractor also contributed to the accident. California allows multiple parties to share fault, so your compensation may come from more than one source depending on what caused the signal to fail in the first place.
What evidence helps prove a traffic signal was malfunctioning at the time of my accident?
Useful evidence often includes traffic camera or nearby business surveillance footage, 911 call records, the police report from the scene, and any prior complaints or repair requests filed with the agency responsible for the signal. Maintenance logs and inspection records can show whether the agency knew about the problem before your crash. Witness statements and photographs of the intersection taken soon after the accident can also help establish how the signal was behaving. Gathering this evidence quickly matters, since some records and footage are only kept for a limited time.
Can more than one party be held responsible for the same traffic signal accident?
Yes. A single crash caused by a faulty traffic signal can involve several potentially liable parties, including the government agency responsible for maintenance, the manufacturer of defective equipment, a contractor who installed or repaired the signal negligently, or another driver who failed to react safely to the malfunction. California’s comparative fault rules allow responsibility to be divided among multiple parties based on each party’s share of fault. Identifying every liable party can also mean more available insurance coverage to help cover your losses.
Does California’s comparative fault rule affect how much compensation I can recover?
Yes. California follows a pure comparative fault rule, which means your compensation can be reduced by the percentage of fault assigned to you, but you are not automatically barred from recovering damages even if you share some responsibility for the crash. For example, if you are found to be twenty percent at fault, your total compensation may be reduced by that same percentage. This rule makes it especially important to have an attorney investigate every factor that contributed to your accident, including any role the malfunctioning signal played.
