Can You Sue a Government Agency for a California Highway Accident?

Last updated August 4, 2026. Legal procedures may change, so it is important to consult with an experienced attorney for current requirements.

A highway collision involving a pothole, unsafe design, missing warning, or negligent government worker can raise a different legal question than an ordinary traffic accident. The agency may have special defenses, and the filing rules can affect whether a later lawsuit is allowed at all.

Yes, you can sue a government agency for a California highway accident, but you generally must first file a formal administrative claim with the responsible agency. The California Courts explain that if the agency denies the claim, you typically have six months from the mailed rejection to file a lawsuit. Because these deadlines are strict, schedule a consultation with DC Law Group promptly to evaluate your claim.

The first step is understanding what the Government Claims Act requires, why it applies before court proceedings, and how the process differs depending on whether the responsible entity is the state, a county, or a city.

What Is the California Government Claims Act?

The California Government Claims Act establishes a required administrative step for many injury claims against a public entity. If a highway crash may involve the State of California, Caltrans, a county, or another government agency, an injured person generally cannot begin a lawsuit in court against that entity immediately. Before suing, the person must first submit a formal claim to the relevant agency.

Why is an administrative claim required?

The claim gives the government entity an opportunity to review the incident and respond before litigation begins. The claimant must identify the basic facts supporting the demand, including what happened, where the accident occurred, and the nature of the injuries or property damage. The agency may accept or deny the claim, but the administrative filing is not the same as filing a lawsuit. Missing the claim requirement can jeopardize the right to bring a later court action. Even when the underlying highway condition or government conduct appears to have caused the crash.

Is the claims process insurance?

No. Caltrans describes the Government Claims process as an early-resolution procedure for potential lawsuits, not a reimbursement or insurance program. That distinction matters because the agency's review does not function like an ordinary insurance claim. The process is part of the legal pathway for preserving a potential claim against a public entity. Caltrans Government Claims information

Does filing a claim prove government liability?

Filing a claim does not establish that the government entity caused the accident or must pay damages. Caltrans states that submitting a claim, and the agency's investigation of it, is not an admission of liability by the State of California. The claimant still must support the legal basis for liability and comply with the applicable deadlines and procedures.

When Can You Sue a Government Agency for a California Highway Accident?

Government claims follow a compressed timeline. When you can sue a government agency for a California highway accident depends on whether you preserved your claim before each deadline expired. Missing one of these dates can permanently bar your right to pursue compensation, even when the evidence supports government liability.

File the administrative claim within six months

For a personal injury or property damage claim, you typically must submit a formal administrative claim to the appropriate California government entity within six months of the incident. This claim is generally required before filing a lawsuit. The relevant agency may be Caltrans, a county, a city, or another public entity, depending on who controlled the highway, roadway, design, or maintenance at issue. Do not assume that reporting the collision to law enforcement, notifying an insurer, or speaking with a government employee satisfies this requirement.

Track the agency response and the lawsuit deadline

After you submit the claim, the agency generally has 45 days to respond. A rejection starts another strict clock: you generally have six months from the date the rejection was mailed to file a lawsuit in court. If the agency does not respond within 45 days, you generally have up to two years from the date of injury to start a lawsuit. That longer period does not eliminate the need to file the initial administrative claim within the applicable six-month window.

These government-specific deadlines interact with California's other filing rules. Review the statute of limitations for government claims and obtain legal guidance promptly, particularly if the agency has already denied your claim or the six-month filing date is approaching.

Common Highway Scenarios Involving Government Liability

Government liability may arise when a highway condition, design choice, or public employee's conduct contributes to a collision. The key issue is not simply that the crash occurred on public property. A claim generally requires evidence that the responsible agency had a legal duty, the roadway or conduct fell below that duty, and the failure caused the injuries.

Dangerous road conditions

Potholes, uneven pavement, debris, drainage problems, and missing or damaged guardrails can create hazards for drivers and passengers. Photographs of the roadway, measurements, maintenance records, witness statements and reports of earlier incidents may help show what made the condition dangerous and whether the agency had notice of it. Preserve the scene when possible, because road repairs can erase important evidence.

Defective highway design

Some collisions result from the way a highway was planned or built rather than from a temporary maintenance problem. Examples may include an unsafe merge, a poorly configured intersection, inadequate sight distance, or a roadway layout that channels traffic into a predictable conflict point.

Collisions involving government employees

A crash may also involve the conduct of a government employee, including a California Highway Patrol officer or a Caltrans worker operating a vehicle or performing roadway work. Caltrans explains that its Government Claims process must be followed to preserve the right to sue the department for many claims. For more context, see these California highway accident claims and information about severe California car accident injuries.

Filing a Claim With Caltrans for a Highway Accident

If a California highway accident appears connected to a pothole, unsafe roadway design, missing warning, debris, or a maintenance failure, the claim process generally begins with Caltrans rather than with a lawsuit. Caltrans explains that its claims process must be followed to preserve the right to sue the department for many types of claims. Review Caltrans official damage-claim guidance before submitting paperwork.

Identify the correct Caltrans claims office

Start by confirming the exact location of the collision, including the highway, direction of travel, nearest interchange or mile marker, and the county where the incident occurred. You must know the county to identify the correct Caltrans District Claims Office because each county is assigned to a particular district office.

Complete the appropriate claim form

For a claim involving personal injury or damage to personal property that you believe Caltrans caused. Claims of $12,500 or less may be filed directly with Caltrans using its designated form. Provide a clear description of the highway condition, how it contributed to the collision, and the injuries or property damage that followed. Attach available photographs, incident reports, medical records, and other materials that help identify the condition. Keep a complete copy of everything submitted, along with proof of delivery.

Suing a City or County Government for a Highway Accident

When a highway accident involves a public road, the responsible government entity may not be the same agency that investigated the collision. Caltrans generally handles state highways and interstates. A county may be responsible for a county-maintained road, while a city may be responsible for a city street or other municipal roadway.

EntityResponsible ForClaims Process

Caltrans (State)State highways, interstates, freewaysFile directly with Caltrans District Claims Office based on county

County GovernmentCounty-maintained roads, rural routesContact county claims administrator for procedures

City GovernmentCity streets, municipal roadsSearch city website or contact city clerk for claim instructions

City and county claims follow their own procedures

Cities and counties have separate administrative procedures for receiving government claims. The California Courts Self-Help Guide advises people pursuing a city or county claim to search for the agency's filing instructions or contact the city or county directly. Before filing, confirm whether the roadway falls within city or county jurisdiction and locate the correct claims administrator.

Government Code rules can affect the claim

California Government Code sections 905 and 911.2 contain important rules and potential exceptions within the Government Claims Act. Those provisions can affect whether a claim is required, how it must be presented, and what deadlines apply. A lawyer can evaluate the roadway jurisdiction, preserve evidence, and determine whether the administrative claim was submitted to the proper entity before court deadlines become an issue.

When To Contact a Lawyer About a Government Liability Claim

Government liability claims involve traps that many accident victims do not know about. Use these steps promptly, and consider speaking with a California freeway accident lawyer before submitting paperwork that could affect your rights.

Identify the responsible government agency. Determine whether the road or freeway involved Caltrans, a county, or a city. The correct agency matters because each has its own claim-filing procedures.

Document the accident scene and road conditions immediately. Photograph damage, lane markings, potholes, signs, and lighting. Save witness information, collision reports, and medical records.

File the administrative claim within six months. California generally requires a claim against a government entity to be submitted within six months of the incident. The California Courts government-claim guidance explains the required process.

Consult an experienced California personal injury lawyer before filing. A lawyer can help identify the proper public entity, evaluate possible exceptions, and organize supporting facts.

Prepare for the claim response. The agency generally has 45 days to respond. If it denies the claim, you generally have six months from the date the rejection was mailed to file a lawsuit.

Frequently Asked Questions

Can you sue the state of California for a car accident?

Yes, but you generally must follow the California Government Claims Act before filing a lawsuit. That usually means submitting a formal administrative claim to the responsible agency and preserving evidence showing how a highway condition. Roadway design, or government conduct contributed to the crash.

How long do you have to file a claim after a California highway accident?

For many personal-injury or property-damage claims, the deadline is typically six months from the date of the incident. The deadline can depend on the claim and the agency involved, so do not assume that ordinary injury deadlines apply.

What happens after a government agency denies the claim?

If the agency rejects the administrative claim, you generally have six months from the date the rejection was mailed to file a lawsuit. Missing that deadline can jeopardize the right to pursue the claim. California Courts provide the applicable rejection guidance.

Are government agencies immune from liability after a California highway accident?

Government agencies are not automatically liable for every collision, but immunity rules do not eliminate every potential claim. Liability may depend on a statutory exception, dangerous roadway condition, negligent maintenance, or another legally recognized basis. California Government Code sections 905 and 911.2 contain important claims-process rules and exceptions.

Where do you file a claim for an accident involving Caltrans?

Caltrans has its own claims process, and the correct District Claims Office depends on the county where the incident occurred. Caltrans states that the Government Claims process must be followed to preserve the right to sue for many claims involving the department.

Ready To Discuss Your Government Claim?

Understanding the Government Claims Act and its deadlines can be difficult after a California highway accident. A focused review may help clarify which agency rules apply and what steps to consider next. Schedule a free consultation with DC Law Group to discuss your claim against a government agency.

Call (310) 571-8860 to speak with the firm about your situation.