Quick Answer: In most California motorcycle accidents involving another vehicle, the driver of the car or truck — not the motorcyclist — is at fault. The most-cited research, the Hurt Report (Hurt, Ouellet & Thom, 1981), found that in two-thirds (66%) of multi-vehicle motorcycle crashes, the other motorist caused the collision. The single most common scenario is a passenger vehicle making a left turn directly into the path of an oncoming motorcycle. California’s pure comparative fault rule means a rider can still recover damages even if partially at fault.

The Data: Drivers Cause the Majority of Motorcycle Crashes

As a Los Angeles motorcycle accident lawyer, I know that the widespread belief that motorcyclists are usually at fault for their own crashes is contradicted by every major study of motorcycle accident causation. The most authoritative source remains the Hurt Report, a 1981 NHTSA-commissioned study of 900 Los Angeles-area motorcycle accidents that has been continuously cited and updated by safety researchers ever since.

Key Hurt Report findings that still hold true on California roads today:

• 66% of multi-vehicle crashes were caused by the other motorist, not the motorcyclist.
• The most common scenario is a left-turning passenger vehicle violating the motorcyclist’s right of way.
• “I didn’t see the motorcycle” is the most common driver excuse — and it does not absolve the driver of liability.
• Inattention to traffic by the driver of the other vehicle is the dominant cause of motorcycle accidents.

The #1 Cause of Motorcycle Accidents: The Left-Turning Driver

The classic California motorcycle crash looks like this: a driver heading the opposite direction makes a left turn at an intersection (or into a driveway) and turns directly into the path of an oncoming motorcyclist with the right of way. The motorcyclist either strikes the side of the vehicle or is struck by the front bumper as the car cuts across.

California Vehicle Code §21801 governs left turns and requires drivers to yield the right of way to all oncoming traffic that is close enough to constitute an immediate hazard. A driver who turns into the path of an oncoming motorcyclist almost always violates this section, which establishes negligence per se under California law.

Why Drivers Keep Hitting Motorcycles

• Smaller visual profile: motorcycles are harder to see
• Motion camouflage: a motorcycle approaching head-on can appear stationary
• Drivers scan for cars, not bikes — a phenomenon called “inattentional blindness”
• Distracted driving (cell phones, infotainment systems, GPS)
• Misjudging the speed and distance of an oncoming motorcycle

Other Common California Motorcycle Accident Scenarios and Who Is at Fault

Rear-End Collisions

When a car rear-ends a motorcyclist who is stopped at a light or in slow traffic, the rear driver is almost always at fault under California Vehicle Code §22350 (basic speed law) and §21703 (following too closely). Rear-end crashes are particularly dangerous for motorcyclists because there is no rear bumper or crumple zone.

Unsafe Lane Changes and “Swoop-Ins”

When a driver changes lanes into a motorcyclist’s lane without seeing the bike, the lane-changing driver is at fault under California Vehicle Code §22107 (turning movements and required signals).

Dooring Accidents

When a parked driver opens a door into the path of a motorcyclist, the driver who opened the door is at fault under California Vehicle Code §22517.

Single-Vehicle Crashes

Many motorcycle accidents involve no other vehicle. These are often blamed on the rider, but in many cases liability still rests elsewhere: a road defect (potholes, gravel, poor signage), a defective motorcycle component, a hazard left by a construction crew, or another driver whose behavior caused the rider to take evasive action. Government entities can be liable for dangerous road conditions, but a six-month claim deadline applies.

What About Lane Splitting? Is That the Motorcyclist’s Fault?

Lane splitting has never been prohibited in California, and since January 1, 2017, California Vehicle Code §21658.1 has expressly defined it and authorized the CHP to publish safety guidelines. Insurance companies routinely argue that any motorcyclist who was lane splitting at the time of a crash was comparatively negligent. Lane splitting is legal, so a rider who lane splits at a reasonable speed for traffic conditions is not negligent simply for doing so. Defending against this argument is one of the most common things an experienced California motorcycle attorney does.

California’s Pure Comparative Fault Rule: You Can Recover Even if Partially at Fault

Under California Civil Code §1714 and the California Supreme Court’s decision in Li v. Yellow Cab Co. of California, 13 Cal. 3d 804 (1975), an injured rider can recover damages even if they were partially at fault for the crash. The rider’s recovery is reduced in proportion to their share of fault.

How Pure Comparative Fault Works in Practice

Suppose your damages are $500,000 and a jury finds you 30% at fault for speeding while the left-turning driver is 70% at fault. You still recover $350,000 (70% of $500,000). This is a major advantage over states with contributory negligence rules, where any fault on your part bars recovery.

Insurance adjusters know this rule and routinely overstate the rider’s share of fault to reduce settlement value. Common defense arguments to push fault onto the rider include speeding, lane splitting, helmet non-compliance (California is a universal helmet state under California Vehicle Code §27803), loud pipes, modified motorcycle, and rider experience level. Each of these arguments can be countered with proper investigation and expert testimony.

Frequently Asked Follow-Up Questions

Sources and Authorities Cited in This FAQ

• Hurt, H.H., Ouellet, J.V., & Thom, D.R. (1981). Motorcycle Accident Cause Factors and Identification of Countermeasures, NHTSA
• California Vehicle Code §21801 (left turn yield requirements)
• California Vehicle Code §21658.1 (lane splitting)
• California Vehicle Code §22350 (basic speed law)
• California Vehicle Code §21703 (following too closely)
• California Vehicle Code §22517 (opening doors into traffic)
• California Vehicle Code §27803 (motorcycle helmet requirement)
• California Civil Code §1714 (comparative fault)
• Li v. Yellow Cab Co. of California, 13 Cal. 3d 804 (1975)
• California Code of Civil Procedure §335.1 (two-year statute of limitations)

Related Resources From Our Firm

• Motorcycle Accident Attorneys in Los Angeles California (practice page)
• Most Common Motorcycle Crash Injuries

Speak With a Los Angeles Personal Injury Lawyer Today

If you or a loved one was injured in an accident in Los Angeles or anywhere in California, Steven M. Sweat, Personal Injury Lawyers, APC offers free, no-obligation case reviews. With over 30 years of experience in personal injury and wrongful death law, we have recovered millions of dollars for accident victims throughout California. You pay nothing unless we win your case.

Call: 866-966-5240 (toll free)

Email: ssweat@victimslawyer.com

West Los Angeles: 11500 W. Olympic Blvd., Suite 400, Los Angeles, CA 90064

Huntington Beach: 7755 Center Ave #1100, Huntington Beach, CA 92647 (714-465-5618)

Online: victimslawyer.com

Bilingual services available — Se habla español.

Disclaimer: The information on this page is for general educational purposes only and does not constitute legal advice. Reading this article does not create an attorney-client relationship. Past results do not guarantee future outcomes. Every case is evaluated on its individual merits.

Los Angeles is one of the most dangerous cities in the United States for motorcycle riders. The combination of year-round riding weather, the nation’s most congested freeway system, millions of distracted drivers, and high-speed canyon and coastal roads creates conditions where serious motorcycle crashes are a daily occurrence — not an aberration.

If you or a loved one has been injured in a motorcycle accident in Los Angeles, understanding the scope of the problem and the legal landscape is the first step toward protecting your rights. This guide draws on data from the California Highway Patrol (CHP), the UC Berkeley SafeTREC program, the California Office of Traffic Safety (OTS), LADOT’s Vision Zero initiative, and the Transportation Injury Mapping System (TIMS) to provide a comprehensive, data-driven picture of motorcycle accident risk in Los Angeles.

Our Los Angeles motorcycle accident lawyer practice page provides a full overview of how our firm handles motorcycle accident claims, our case results, and what to expect when you retain us. This article focuses specifically on the data behind motorcycle accident risk in Los Angeles, the roads and crash scenarios responsible for the most serious injuries, and the legal framework that governs your right to compensation.

The Scale of the Problem: Los Angeles Motorcycle Accident Statistics

The numbers are stark. Los Angeles County leads all counties in California — and most jurisdictions in the United States — in the sheer volume of motorcycle crashes, serious injuries, and fatalities. This is not simply a function of population size. The density of LA’s traffic, the prevalence of freeway riding, and the year-round riding season combine to create a uniquely hazardous environment for motorcyclists.

According to data compiled from California’s Transportation Injury Mapping System (TIMS), Los Angeles County recorded 2,828 serious motorcycle accidents in 2025 — a figure that, while slightly lower than 2024’s 2,970, represents a persistently high and worsening five-year trend. The city of Los Angeles alone recorded 996 motorcycle accidents with injuries in 2025, up from 919 in 2024.

The UC Berkeley SafeTREC 2025 report confirms that in 2023, Los Angeles County recorded 125 motorcycle fatalities — more than any other county in California and more than double the 52 fatalities recorded in second-place San Diego County. No other county comes close.

Los Angeles in the National and State Context

The disproportionate danger motorcyclists face in Los Angeles reflects broader national and state trends, amplified by LA’s unique traffic conditions:

Source: UC Berkeley SafeTREC 2025 Traffic Safety Facts: Motorcycle Safety; NHTSA Traffic Safety Facts 2023; California OTS 2025 Quick Stats; TIMS 2021–2025.

Where Motorcycle Accidents Happen in Los Angeles: The Highest-Risk Locations

Motorcycle crashes in Los Angeles are not randomly distributed. Data from TIMS, SWITRS, and LADOT’s Vision Zero initiative consistently shows that the same corridors, intersections, and road types account for a disproportionate share of serious crashes and fatalities. Understanding where accidents cluster is essential both for riders trying to stay safe and for attorneys building liability cases.

The Freeway System: Volume, Speed, and Blind Spots

Los Angeles’ freeway network is among the most congested in the world — and for motorcyclists, that congestion is a double-edged hazard. High traffic density increases the frequency of lane-change collisions and rear-end crashes, while high speeds magnify the severity of any impact. According to TIMS data for 2025, the deadliest and most accident-prone freeways for motorcyclists in Los Angeles County include:

Source: California TIMS 2025 data via Maison Law Los Angeles Motorcycle Accident Statistics Study (March 2026); SafeTREC / UC Berkeley.

The I-405 is the single most dangerous freeway for Los Angeles motorcyclists, averaging 158 injury-producing crashes per year over the five-year period from 2021 to 2025. Two stretches are particularly dangerous: the Sepulveda Pass between the 10 and the 101, and the pinch point between Venice Boulevard and Wilshire Boulevard where multiple freeway ramps create constant, unpredictable lane changes.

Scenic and Canyon Roads: High Risk, Low Margin for Error

Beyond the freeways, several of Los Angeles’ most iconic roads are also its most dangerous for riders. These routes attract motorcyclists precisely because of their challenging characteristics — and those same characteristics make crashes both more likely and more severe.

Urban Surface Streets: Where Left Turns Kill

While freeway crashes attract headlines, SWITRS data consistently shows that approximately 60% of fatal motorcycle crashes in California occur on non-freeway roads — primarily urban arterials and surface streets where left-turn collisions, intersection conflicts, and pedestrian interactions are most common. In Los Angeles, the highest-risk surface street corridors identified by LADOT’s Vision Zero High Injury Network (HIN) and SafeTREC data include:

• Sunset Boulevard — Hollywood, Silver Lake, and Echo Park sections see frequent crashes from nightlife traffic, sudden lane changes, and left-turn conflicts
• Sepulveda Boulevard — heavy multi-lane traffic with frequent driveway and side-street intersections along its entire length
• Venice Boulevard — identified in LADOT’s Vision Zero program for high collision density; mixed bicycle, pedestrian, and vehicle traffic
• Hollywood Boulevard — LADOT data shows 53 severe and fatal collisions on a short segment between Gower St. and Fountain Ave. from 2010–2019
• La Cienega Boulevard and La Brea Avenue — major north-south corridors with frequent left-turn cut-offs and rideshare vehicle stops
• Laurel Canyon Boulevard — steep, narrow grades and blind curves with heavy commuter traffic between the Valley and Hollywood
• Downtown Los Angeles grid — dense mixed traffic, Uber/Lyft pickup zones, delivery vehicles, and confusing lane configurations create consistent motorcycle hazards

LADOT’s Vision Zero program identifies a High Injury Network (HIN) — approximately 6% of city streets that account for 65% of all deaths and severe injuries. Many of the corridors above fall within this network, and motorcyclists traveling them face statistically elevated risk compared to the broader city street grid.

How Motorcycle Accidents Happen in Los Angeles: The Most Common Crash Scenarios

Understanding the mechanics of how crashes occur is essential both for riders trying to protect themselves and for attorneys establishing liability. The UC Berkeley SafeTREC 2025 report, drawing on California SWITRS data, identifies the following primary crash factors and crash types in fatal and serious injury motorcycle crashes in California in 2023.

1. Left-Turn Collisions — The Leading Killer

Left-turn collisions — where a vehicle turns left directly into the path of an oncoming motorcycle — are the single most common type of fatal motorcycle crash in Los Angeles and across California. Research indicates these collisions account for approximately 42% of fatal motorcycle crashes. The physics are unforgiving: the motorcyclist has almost no time to react, and the impact is typically broadside, with the rider absorbing the full force.

Under California Vehicle Code § 21801, a driver making a left turn must yield to all oncoming vehicles with the right of way. When a driver fails to yield and strikes a motorcyclist, they are presumptively at fault. However, insurance companies for the at-fault driver routinely attempt to argue that the motorcyclist was speeding or otherwise contributed to the crash. An experienced motorcycle accident attorney will investigate the physical evidence — skid marks, vehicle damage angles, witness statements, and available surveillance footage — to counter these arguments.

2. Unsafe Lane Changes and Blind-Spot Collisions

Unsafe lane changes account for approximately 19% of motorcycle collisions in Los Angeles, according to 2024 SWITRS data analyzed by SafeTREC and UC Berkeley. Motorcycles’ smaller profiles make them especially vulnerable to being hidden in the blind spots of passenger vehicles, SUVs, and commercial trucks. A driver who fails to check their blind spot before changing lanes and strikes a motorcycle is liable for the resulting injuries under California’s negligence standard.

This crash type is particularly prevalent on Los Angeles’ congested freeways, where drivers make frequent lane changes and may not notice a motorcycle in the adjacent lane — especially in heavy traffic where motorcycles may be lane-splitting or filtering.

3. Unsafe Speed

Unsafe speed is the single most common primary crash factor in California motorcycle FSI (fatal and serious injury) crashes, accounting for more than one in four crashes according to SafeTREC 2025 data. Nationally, 36% of all motorcycle riders involved in fatal crashes in 2023 were speeding — compared to 22% of passenger car drivers. In Los Angeles, this pattern plays out both on freeways where riders may be traveling significantly above posted limits, and on canyon roads like The Snake and Angeles Crest where the technical demands of the road exceed the rider’s speed management.

When speed is a factor and the crash involves another vehicle, California’s pure comparative fault rules (Civil Code § 1714) come into play. Even if the motorcyclist was traveling above the speed limit, the other driver’s failure to yield, improper lane change, or other negligent act may still make them primarily or substantially at fault — and the motorcyclist may still recover substantial compensation.

4. Lane Splitting Crashes

California is the only state in the nation where lane splitting — riding a motorcycle between lanes of slow or stopped traffic — is explicitly legal under California Vehicle Code § 21658.1. This practice reduces rear-end collision risk in heavy traffic and is a legitimate and common part of Los Angeles riding culture. However, it also creates unique crash scenarios when drivers make sudden lane changes without checking for motorcycles between lanes.

In 2024 Los Angeles motorcycle crash data, unsafe lane changes accounted for 19% of collisions — a category that includes both traditional blind-spot changes and changes that cut off lane-splitting riders. Insurance companies frequently attempt to use lane splitting as a basis to blame the rider for a crash. This argument is legally flawed when the other driver’s lane change was the proximate cause of the collision. Our firm has extensive experience litigating lane-splitting cases and countering insurer attempts to misuse this issue.

See also: Motorcycle Lane Splitting Accidents in California: Liability and Legal Rights.

5. Rear-End Collisions

Rear-end collisions represent approximately 15% of serious motorcycle crashes in California, according to SafeTREC 2025 data. For motorcyclists, a rear-end impact that would be a minor fender-bender between two passenger vehicles can be catastrophic or fatal. The absence of a protective vehicle frame means the rider absorbs the full energy of the impact, frequently being thrown from the bike at speed.

In stop-and-go freeway traffic — a daily reality on the I-405, I-10, and US-101 in Los Angeles — distracted drivers who are following too closely are a persistent threat to motorcyclists who slow or stop. Distracted driving, particularly cell phone use, has been a growing factor in rear-end collisions across all vehicle types.

6. Impaired Driving

Alcohol-impaired driving is involved in approximately 26% of motorcycle fatalities nationally and 29% in California, according to NHTSA 2023 data. In Los Angeles, this translates to a significant portion of the city’s motorcycle fatality toll. DUI drivers have dramatically reduced reaction times, impaired visual processing, and compromised judgment — all of which make them disproportionately dangerous to motorcyclists who have a far smaller margin for error in any collision.

When a DUI driver causes a motorcycle accident, California law permits the injured rider to seek punitive damages in addition to compensatory damages, based on the driver’s conscious disregard for the safety of others. This can substantially increase the total recovery available to a seriously injured rider or the family of a rider killed by an impaired driver.

7. Road Hazards

Road hazards that pose minimal risk to enclosed passenger vehicles — potholes, uneven pavement, gravel, debris, oil patches, and damaged lane markings — can be catastrophic for motorcyclists. California’s TIMS data shows road defects as a contributing factor in a meaningful percentage of single-vehicle motorcycle crashes. In Los Angeles, where approximately half of all road surfaces are in poor or mediocre condition according to pavement quality indices, this is a persistent and serious hazard.

When a road hazard causes a motorcycle accident, liability may extend beyond the other driver to government agencies responsible for road maintenance. Claims against government entities in California require filing a government tort claim within six months of the incident — a critical deadline that riders and families must be aware of.

For step-by-step guidance on protecting your rights after any type of motorcycle crash in Los Angeles, see our complete guide: What to Do Immediately After a Motorcycle Accident in California.

When Motorcycle Accidents Most Often Occur in Los Angeles

Crash data from SafeTREC and TIMS reveals consistent temporal patterns in Los Angeles motorcycle accidents. Understanding these patterns helps riders make informed decisions about when and where to ride — and helps attorneys contextualize the circumstances of individual crashes.

The convergence of factors during afternoon and early evening hours explains why this window is so dangerous: sun glare reduces driver visibility, rush-hour traffic creates frustration and aggressive driving behavior, and weekend leisure riders — often less experienced than daily commuters — are sharing canyon roads and freeways at the same time.

Injuries Motorcyclists Sustain in Los Angeles Crashes

Because motorcyclists have no protective frame, crumple zones, airbags, or seatbelts, the injuries sustained in crashes are frequently catastrophic. SafeTREC data shows that in California motorcycle crashes, male victims aged 25–34 represent the single largest group of fatalities and serious injuries. The most common injury types our firm handles include:

• including concussions, diffuse axonal injury, and severe TBI requiring neurosurgical intervention. Even helmeted riders can sustain significant TBI in high-speed or high-impact collisions. Traumatic brain injuries (TBI)
• including partial and complete paralysis. The forces involved in motorcycle crashes frequently cause cervical and lumbar spine injuries requiring surgery, fusion, and often lifetime care. Spinal cord injuries
• ranging from superficial abrasions to deep-layer injuries penetrating to muscle and bone, requiring skin grafts and extensive wound care with significant infection risk. Road rash
• Femur, tibia/fibula, humerus, pelvis, and wrist fractures are common. NHTSA data shows leg and foot injuries account for 30% of non-fatal motorcycle emergency room visits; head and neck injuries account for 22%. Orthopedic fractures
• Damage to the liver, spleen, and kidneys may not be immediately apparent and can be life-threatening if not promptly diagnosed. Internal injuries
• Los Angeles averages 44 motorcycle fatalities per year in the city alone. The firm represents families of riders killed by negligent drivers in wrongful death claims. Wrongful death

For a comprehensive medical and legal guide to each of these injury types, see: Most Common Motorcycle Crash Injuries in California.

Your Legal Rights After a Motorcycle Accident in Los Angeles

California law provides robust protections for motorcycle accident victims — but those protections only work if you act promptly and with proper legal representation. Here is what every rider injured in Los Angeles needs to know.

Pure Comparative Negligence

California follows a pure comparative negligence rule under Civil Code § 1714. This means you can recover compensation even if you were partially at fault for the accident — your recovery is reduced, not eliminated, by your percentage of fault. Insurance companies routinely attempt to assign inflated fault percentages to motorcycle riders, exploiting persistent cultural biases about rider recklessness. An experienced attorney will build a counter-narrative grounded in the physical evidence and California law.

For a detailed breakdown of what motorcycle accident claims are worth in California by injury type, see: Average Motorcycle Accident Settlement Amounts in California.

Lane Splitting Is Legal — Do Not Let Insurers Tell You Otherwise

California Vehicle Code § 21658.1 explicitly permits lane splitting when done safely. A motorcyclist who was lawfully lane-splitting when struck by a driver who changed lanes without checking their blind spot has a strong liability claim against that driver. The fact of lane-splitting alone does not defeat your case — the critical question is whether the other driver’s conduct was negligent.

Statute of Limitations

California’s statute of limitations for personal injury claims is two years from the date of the accident under Code of Civil Procedure § 335.1. If a government entity — such as Caltrans or the City of Los Angeles — is involved because a road defect contributed to the crash, a government tort claim must be filed within six months. Missing these deadlines can permanently bar your right to compensation regardless of the strength of your case.

Uninsured and Underinsured Motorist Coverage

California has a significant uninsured and underinsured driver problem. If the driver who caused your accident carried no insurance or insufficient coverage, your own UM/UIM policy becomes your primary source of recovery. Recent changes under California SB 371 have increased minimum UM/UIM coverage limits. Our firm identifies every available source of coverage — including policies you may not know you have — and pursues maximum recovery under each.

Learn more: Uninsured and Underinsured Motorist Coverage in California: What Injured Riders Need to Know.

What to Do Immediately After a Motorcycle Accident in Los Angeles

• Call 911 — request police and paramedics. A police report is essential to your claim.
• Do not refuse medical treatment at the scene. Going to the emergency room creates a contemporaneous record of your injuries that is difficult for insurers to challenge.
• Document the scene with photos and video before vehicles are moved — include road conditions, skid marks, debris, and traffic controls.
• Get witness information. Independent witnesses are among the most valuable assets in a disputed liability case.
• Do not give a recorded statement to the other driver’s insurance company without first speaking to an attorney. Adjusters are trained to elicit statements that reduce your recovery.
• Contact a motorcycle accident lawyer as soon as possible. Evidence disappears fast — surveillance footage is overwritten, skid marks fade, and witnesses become harder to locate.

Why Los Angeles Motorcycle Accident Victims Choose Steven M. Sweat

Not every personal injury attorney has the experience, resources, or commitment to effectively represent a seriously injured motorcycle rider. Insurance companies know which attorneys will take a case to trial and which ones will fold under pressure. Steven M. Sweat has spent over 30 years representing injured riders throughout Los Angeles and California — and insurance carriers know it.

Our firm has recovered millions of dollars for motorcycle accident victims in Los Angeles, including:

• $1,250,000 — Motorcyclist struck by left-turning vehicle at Los Angeles intersection; traumatic brain injury and orthopedic injuries
• $1,000,000 — Full policy limits settlement for the family of a motorcycle rider struck and killed on the 405 freeway by a driver making an unsafe lane change
• $875,000 — Rear-end collision on California freeway; spinal cord injury requiring surgical intervention
• $625,000 — Lane-change collision on I-405; fractured femur and road rash requiring skin grafts

Past results do not guarantee future outcomes. Every case is evaluated on its specific facts and circumstances.

Frequently Asked Questions

How many motorcycle accidents happen in Los Angeles each year?

Los Angeles County recorded 2,828 serious motorcycle accidents (involving injuries) in 2025, according to TIMS data. Over the five-year period from 2021 to 2025, Los Angeles County has averaged approximately 2,800 injury-producing motorcycle accidents per year — more than any other county in California. The city of Los Angeles proper averaged 951 motorcycle accidents with injuries per year over the same period.

What are the most dangerous roads for motorcyclists in Los Angeles?

Based on TIMS and SWITRS data, the most dangerous roads for motorcyclists in Los Angeles are the I-405 (which alone sees approximately 158 injury-producing motorcycle crashes per year), the I-5, Pacific Coast Highway through Malibu, Mulholland Highway’s “Snake” section, Angeles Crest Highway, and urban arterials including Sunset Boulevard, Sepulveda Boulevard, and Venice Boulevard. LADOT’s Vision Zero High Injury Network identifies approximately 6% of city streets that account for 65% of all severe traffic injuries and deaths.

What is the most common cause of motorcycle accidents in Los Angeles?

According to SafeTREC 2025 data drawing on SWITRS, the most common primary crash factor in fatal and serious injury motorcycle crashes in California is unsafe speed, accounting for more than one in four crashes. The second most common cause is improper turning — primarily left-turn failure to yield — which accounts for approximately 22% of FSI motorcycle crashes. Unsafe lane changes and alcohol impairment round out the top causes.

Can I recover compensation if I was lane splitting when the accident happened?

Yes, in most cases. Lane splitting is legal in California under CVC § 21658.1. The fact that you were lane-splitting when struck does not defeat your claim if the other driver’s negligence — such as an unsafe lane change — caused the collision. California’s pure comparative fault system allows you to recover compensation even if you were partially at fault; your recovery is reduced proportionally, not eliminated.

What should I do if I was injured by a hit-and-run driver?

Los Angeles has one of the highest hit-and-run rates in the United States. If you are struck by a driver who flees the scene, your own uninsured motorist (UM) coverage is your primary source of recovery under California law. Contact law enforcement immediately and try to preserve any available surveillance or dashcam footage. An attorney can help you identify coverage under policies you may not know you have and ensure you meet all claim deadlines.

Contact a Los Angeles Motorcycle Accident Lawyer Today

If you or a loved one has been injured in a motorcycle accident anywhere in Los Angeles or Southern California, the decisions you make in the days immediately following the crash will significantly affect your ability to recover full compensation. Insurance companies are already building their case. Evidence is already disappearing.

Steven M. Sweat, Personal Injury Lawyers, APC has spent over 30 years fighting for injured motorcycle riders across Los Angeles and California. We know the freeways, the courts, and the tactics insurance carriers use. We prepare every case for trial. We do not accept lowball settlements.

Se habla español. Hospital and home visits available for seriously injured clients. Free consultations available 24 hours a day, 7 days a week.

Few topics generate more confusion among California motorcyclists, drivers, and insurance adjusters than lane splitting. For decades it occupied a legal gray zone. That changed in 2016, when California became the first state in the country to formally legalize the practice. Despite the statute being a decade old, insurance carriers still routinely treat any rider who was lane splitting at the time of a crash as automatically negligent. That argument is wrong, and it can be defeated. As Los Angeles motorcycle accident attorneys who have represented injured riders for more than three decades, we have seen this defense tactic used in case after case — and we know how to dismantle it.

This guide walks through what California law actually says about lane splitting, the official CHP safety guidelines, how comparative fault works when a lane-splitting rider is hit, and what you should do if you have been injured while filtering through traffic. The information below is current as of 2026 and reflects the codified statute, the CHP’s most recent published guidance, and the practical realities of litigating these cases against California auto insurers.

California Vehicle Code §21658.1: The Lane Splitting Statute

California is one of a small number of states where motorcycle lane splitting is expressly authorized by statute. Assembly Bill 51, signed by Governor Jerry Brown in August 2016 and codified at California Vehicle Code §21658.1, made California the first state in the United States to formally legalize the practice. The statute was amended in 2018 to clarify the California Highway Patrol’s authority to publish educational guidelines.

The statute itself is short. It defines “lane splitting” as driving a motorcycle that has two wheels in contact with the ground between rows of stopped or moving vehicles in the same lane, including on both divided and undivided streets, roads, or highways. It then authorizes the California Highway Patrol to develop educational guidelines relating to lane splitting in a manner that promotes the safety of motorcyclists, drivers, and passengers.

In plain English: lane splitting is legal in California. A rider who is filtering through traffic between lanes is not breaking the law and is not, by that fact alone, negligent. This is critically important because the defense in nearly every motorcycle injury case where the rider was lane splitting will attempt to argue otherwise.

CHP Lane Splitting Safety Guidelines: What the Official Guidance Actually Says

After §21658.1 took effect, the California Highway Patrol developed and published official lane splitting safety tips for motorcyclists. These guidelines are not law — a rider cannot be cited for violating them — but they are referenced repeatedly in litigation as the benchmark for what a reasonable, prudent rider should do. The current CHP guidance reflects four core recommendations:

1. Speed Differential of 10 mph or Less

The single most important safety variable is the speed gap between the motorcycle and surrounding vehicles. CHP recommends that riders not exceed surrounding traffic by more than 10 miles per hour. The greater the speed differential, the less time other motorists have to react if a motorcycle approaches from between lanes, and the less time the rider has to avoid a vehicle that drifts or changes lanes.

2. Avoid Splitting at 30+ mph Traffic Speeds

CHP guidance discourages lane splitting when surrounding traffic is moving 30 mph or faster. Above this threshold, the consequences of any contact escalate dramatically. This guidance is rooted in research from the California Office of Traffic Safety and the UC Berkeley Safe Transportation Research and Education Center, which found that injury rates for lane-splitting riders rise sharply once the speed differential and absolute speed climb.

3. Split Between the Two Far-Left Lanes

CHP recommends lane splitting between the number 1 and number 2 lanes (the two leftmost lanes) rather than further to the right. Drivers in left lanes are more likely to be expecting filtering motorcycles, and these lanes typically have less debris, fewer commercial vehicles, and lower frequency of right-side hazards like merging traffic.

4. Consider the Total Environment

CHP urges riders to evaluate the full traffic environment: weather and road conditions, the size and behavior of surrounding vehicles, how wide the lanes are, lighting, and the presence of large trucks or buses with significant blind spots. Splitting next to a tractor-trailer at any speed is dangerous; splitting in heavy rain or low visibility multiplies the risk.

These guidelines provide the framework that judges, juries, and insurance adjusters use to evaluate whether a particular rider’s lane splitting was reasonable under the circumstances. A rider who was filtering at 5 mph between two cars at a dead stop in stalled freeway traffic is in a very different position than a rider who was splitting at 60 mph with traffic moving at 35. The law and the guidelines treat them differently — and so does a competent motorcycle accident attorney.

How Insurance Companies Misuse Lane Splitting to Blame the Rider

Despite §21658.1 being on the books since 2017, every California motorcycle accident attorney with significant experience has seen the same playbook from insurance carriers and defense counsel:

• “Your client was lane splitting, so the crash was their fault.”
• “Lane splitting is inherently dangerous, so any rider who chooses to do it accepts the risk.”
• “Even if lane splitting is legal, it is not safe, and a reasonable rider would not have done it.”
• “Our insured did not see the motorcycle because it appeared from between lanes.”

Each of these arguments collapses under California law. Lane splitting is legal. The legislature decided it was permissible. The CHP publishes guidance on how to do it safely. A motorist’s failure to check mirrors and blind spots before changing lanes is not excused by the fact that the vehicle that got hit happened to be a motorcycle riding between lanes lawfully. California Vehicle Code §22107 requires drivers to ensure they can change lanes safely and to signal their intent — those duties apply regardless of who is in the adjacent lane.

The California Highway Patrol’s data on motorcycle accident causation — supported by the landmark Hurt Report and decades of follow-up research — consistently shows that in roughly two-thirds of multi-vehicle motorcycle crashes, the other driver is at fault. “I didn’t see the motorcycle” remains the single most common driver explanation. It is also not a legal defense.

Pure Comparative Fault: Why Even Imperfect Lane Splitting Doesn’t Bar Recovery

California is a pure comparative fault state. Under California Civil Code §1714 and the California Supreme Court’s decision in Li v. Yellow Cab Co., 13 Cal. 3d 804 (1975), an injured plaintiff can recover damages even if they were partially at fault for the accident. The plaintiff’s recovery is reduced in proportion to their share of fault, but there is no threshold that bars recovery.

In practical terms: even if a jury concluded that a rider was 30% at fault for splitting at an unsafe speed differential, the rider can still recover 70% of the damages. If a jury found the rider 10% at fault, recovery is reduced by 10%. This is dramatically more favorable than the contributory negligence rules used in some other states, where any fault on the plaintiff’s part bars recovery entirely, or the modified comparative negligence rules used in many states, where a plaintiff who is 50% or 51% at fault recovers nothing.

Insurance adjusters know this. Their job is to push as much fault onto the rider as possible to drive down the settlement value. Common arguments to inflate rider fault percentage include:

• Rider was splitting too fast relative to surrounding traffic
• Rider was splitting at speeds above 30 mph
• Rider was splitting between non-leftmost lanes
• Rider failed to wear a DOT-compliant helmet under California Vehicle Code §27803
• Rider had loud aftermarket pipes or modifications
• Rider lacked experience or had recently obtained a motorcycle endorsement

Each of these arguments can be countered with proper investigation and expert testimony. Helmet non-compliance, for instance, only reduces recovery for head injuries — not for unrelated injuries like a broken leg. Loud pipes have nothing to do with whether a left-turning driver looked before turning. Rider experience is generally inadmissible character evidence unless it directly relates to a specific act of negligence.

California Statutes That Protect Lane-Splitting Motorcyclists

Several California traffic statutes work in favor of an injured lane-splitting rider when liability is contested:

California Vehicle Code §22107 — Unsafe Lane Changes

This is the statute most often violated by drivers in lane-splitting cases. It prohibits any driver from turning or moving from a direct course or moving right or left upon a roadway until the movement can be made with reasonable safety, and only after giving an appropriate signal. A driver who changes lanes into a lane-splitting motorcyclist has almost certainly violated §22107.

California Vehicle Code §22517 — Opening Vehicle Doors

It is unlawful for any person to open a door on the side of a vehicle available to moving traffic unless it is reasonably safe to do so and can be done without interfering with traffic. “Dooring” a lane-splitting rider — opening a car door into the path of a motorcycle filtering between stopped vehicles — is a clear §22517 violation that creates strong liability.

California Vehicle Code §22400 — Impeding Traffic

Drivers cannot intentionally drive at a slow speed that impedes the normal and reasonable movement of traffic. While this is not commonly cited in lane-splitting cases, it has been raised when drivers deliberately blocked or harassed lane-splitting riders.

California Vehicle Code §21658.1 — Lane Splitting Authorization

The statute itself functions as a shield for the rider. The defense cannot argue that lane splitting is per se unlawful or per se negligent. The activity is lawful by legislative declaration.

Common Lane-Splitting Crash Scenarios in California

Most lane-splitting collisions fall into a small number of recurring patterns. Recognizing the scenario matters because each pattern has its own evidence requirements and its own typical liability allocation.

Unsafe Lane Change Into a Splitting Motorcyclist

This is the most common scenario. A driver in slow or stopped traffic decides to change lanes — often without signaling or shoulder-checking — and clips or hits a motorcyclist filtering between lanes. Liability typically falls primarily on the driver under §22107. Critical evidence includes any dashcam or surveillance footage, vehicle damage patterns, and the position of the vehicles at rest.

Driver Drifts Within Lane and Closes the Gap

Many freeway lanes are wider than necessary, and drivers — especially distracted drivers — drift within the lane. A motorcycle splitting between two cars can be squeezed if either driver drifts. Liability often turns on which driver moved and whether the rider had any reasonable way to avoid the contact.

Dooring of a Lane-Splitting Rider

When traffic is fully stopped on a multi-lane surface street, drivers or passengers sometimes open doors without checking. A motorcyclist filtering between lanes has almost no time to react. §22517 places clear liability on the door-opener, but the rider’s speed is often disputed.

Sudden Brake-and-Swerve in Adjacent Lane

A driver in one of the adjacent lanes brakes hard or swerves to avoid debris or a sudden hazard, encroaching on the lane-split path. Liability allocation depends on whether the driver’s reaction was reasonable and whether the rider was traveling at a safe differential.

Rear-End Collision While Returning to Lane

A motorcyclist who is finishing a lane-split and returning to a single lane can be rear-ended by a vehicle that did not anticipate the motorcycle’s presence. These cases often turn on signaling, mirror checks, and the visibility of the motorcycle’s brake light.

What to Do if You Are Injured While Lane Splitting

The actions you take in the hours and days after a lane-splitting crash significantly affect both your medical recovery and the strength of your eventual injury claim. The following steps are critical:

Damages Available to Injured California Lane-Splitting Riders

California law allows an injured motorcyclist to recover the full range of economic and non-economic damages caused by another party’s negligence. Because motorcyclists lack the protective shell of a passenger vehicle, the injuries from a lane-splitting collision tend to be substantially more severe than those in typical car-versus-car crashes. Recoverable damages include:

• All past and future medical expenses — emergency care, surgery, hospitalization, rehabilitation, physical therapy, in-home nursing, and projected future treatment
• Past and future lost wages, including reduced earning capacity if injuries impair the ability to return to prior work
• Pain, suffering, emotional distress, loss of enjoyment of life, and permanent disfigurement or disability
• Property damage — replacement or repair of the motorcycle, helmet, riding gear, and any other personal property destroyed in the crash
• Loss of consortium for spouses and registered domestic partners
• In wrongful death cases, the damages available to surviving family members under California Code of Civil Procedure §377.60
• Punitive damages where the defendant’s conduct was egregious — for example, a DUI driver who hit a lane-splitting motorcyclist

California has no cap on non-economic damages in standard motor vehicle injury cases. Settlement values in serious lane-splitting injury cases routinely reach into the high six and seven figures, particularly when the rider has sustained traumatic brain injury, spinal cord injury, multiple fractures requiring surgery, or significant scarring.

Statute of Limitations: Don’t Wait Too Long

California Code of Civil Procedure §335.1 sets a two-year statute of limitations for personal injury claims, including motorcycle accident claims. The clock runs from the date of injury. Wrongful death claims under §335.1 also carry a two-year limit, running from the date of death.

If a government entity is involved — for example, a road defect, malfunctioning traffic signal, or a city or county vehicle that contributed to the crash — California Government Code §911.2 imposes a much shorter six-month deadline for filing a Government Tort Claim. Missing this deadline is fatal to a government claim. Lane-splitting cases on freeways and county roads frequently involve potential government liability for poor lane markings, missing signage, or pavement defects, so any rider involved in a serious lane-splitting crash should consult an attorney well within that six-month window.

Frequently Asked Questions: California Lane Splitting Law

Is lane splitting legal everywhere in California?

Yes. California Vehicle Code §21658.1 authorizes lane splitting on all roadways in California — divided and undivided, surface streets, and freeways. There is no city, county, or freeway where it is independently prohibited. The CHP’s safety guidelines apply uniformly statewide.

Can I be ticketed for lane splitting?

Not for the act of lane splitting itself. However, if a rider is splitting at an unsafe speed, weaving recklessly, or violating an independent traffic law (running a red light, speeding, riding under the influence), the rider can still be cited under those separate statutes. The CHP guidelines are not enforceable as traffic violations.

If I was lane splitting when I was hit, can I still recover damages?

Yes. Lane splitting is legal, and being injured while lane splitting does not bar recovery. California’s pure comparative fault rule means even a rider found partially at fault can still recover the portion of damages attributable to the other party’s negligence. The insurance company will likely argue contributory fault — that argument is exactly what an experienced motorcycle accident attorney is built to defeat.

What if I was splitting faster than 10 mph above traffic?

CHP’s 10 mph speed-differential recommendation is guidance, not law. A rider who was splitting at a higher differential is not automatically negligent — the question is whether the speed was reasonable under the totality of the circumstances. A rider going 20 mph faster than dead-stopped traffic on a freeway is in a stronger position than a rider going 20 mph faster than 35 mph traffic on a surface street.

Does it matter that I wasn’t wearing a helmet?

California is a universal helmet state under California Vehicle Code §27803 — all motorcyclists and passengers must wear DOT-compliant helmets. If you were not wearing one, the defense will argue helmet non-compliance contributed to the severity of head injuries. This argument is generally limited to head and facial injuries — it does not reduce recovery for unrelated injuries like fractures, internal injuries, or road rash on other parts of the body.

How long do I have to file a lane-splitting injury claim in California?

Two years from the date of injury under California Code of Civil Procedure §335.1. If a government entity is potentially liable, six months from the date of the incident under California Government Code §911.2. Do not wait — evidence disappears, witnesses become unreachable, and surveillance footage is overwritten quickly.

What is my lane-splitting injury claim worth?

Case value depends on the severity of injuries, the medical treatment required, the impact on your earning capacity, the available insurance coverage, the strength of liability evidence, and the comparative fault allocation. Cases involving serious orthopedic injuries, traumatic brain injury, or permanent disability commonly reach six and seven figures. A free consultation with an experienced motorcycle accident attorney can give you a realistic case value range.

Why Hire Steven M. Sweat for a California Lane-Splitting Injury Case

Steven M. Sweat has practiced exclusively personal injury and wrongful death law in California for more than 30 years. He has handled hundreds of motorcycle accident cases, including many involving lane splitting, and has secured millions of dollars in verdicts and settlements for injured riders throughout Southern California. The firm provides comprehensive representation for California motorcycle accident victims, with offices in West Los Angeles and Huntington Beach serving clients across Los Angeles County, Orange County, Riverside County, San Bernardino County, San Diego County, and the broader Southern California region.

Recognition includes Super Lawyers (continuously since 2012), Avvo 10.0, National Trial Lawyers Top 100, and Multi-Million Dollar Advocates Forum membership. The firm offers free, no-obligation consultations and handles all motorcycle injury cases on a contingency fee basis — you pay nothing unless we recover compensation for you. Bilingual services in English and Spanish are available.

Legal Disclaimer: This article is intended for general informational and educational purposes only and does not constitute legal advice. Reading this article does not create an attorney-client relationship between you and Steven M. Sweat, Personal Injury Lawyers, APC. Every motorcycle accident case is different. The outcome of any particular matter depends on the specific facts and applicable law. If you have been injured in a lane-splitting motorcycle crash, consult a qualified California personal injury attorney to evaluate your specific situation.

What does California law say about carrying passengers on a motorcycle and if there is are injuries to a passengers on motorcycles, who is responsible? As a personal injury lawyer who routinely handles motorcycle collision claims, this is an issue that I deal with quite frequently. There are various provisions of the California Vehicle Code and general negligence laws that come into play in analyzing these issues. I wanted to try to answer some of the common questions that come up in this post.

Is it legal to carry someone on the back of my bike?

The answer to this question, like most legal questions is, it depends. The main provision of law in play is California Vehicle Code §27800 which mandates that it is unlawful to carry another person on a motorcycle as a passenger unless:

1. The motorcycle has a seat “securely fastened to the machine with foot rests” or a sidecar attached and designed for the purpose of carrying passengers;
2. The passenger must keep his or her feet on the foot pegs at all times while traveling on the back of the motorbike.

Is there an age requirement to be a passenger on a motorcycle?

The starting point for answering this question is CVC 27800 above. If a passenger cannot reach the foot rests, it would be unlawful to carry them on the bike. In addition, California Vehicle Code §27360, which requires children under the age of eight to ride in all motor vehicles only when seated in a “passenger restraint system meeting applicable federal motor safety standards” (i.e. a child safety seat). Therefore, until the child is at least eight years old and is tall enough to ride on the back and reach the foot rests, it would be unlawful to carry them on the back of a motorcycle.

Does the motorcycle passenger have to wear a helmet just like the driver?

In a word, YES. California Vehicle Code §27803 mandates that both “a driver” and “any passenger” shall wear a helmet while riding on a “motorcycle”, “motor-driven cycle” or “motorized bicycle”. The helmets must meet the minimum safety standards set forth in California Vehicle Code §27802.

Who is legally responsible if an injury to passengers on motorcycles occurs or if a passenger is killed in a crash?

This really depends upon a lot of factors. Obviously, if the motorcycle operator is carrying a passenger in violation of one of the laws above, this could put them at least partially at fault. Likewise, if the passenger knowingly fails to wear a helmet in violation of state law, they may be partially responsible for their own injuries to the extent that a helmet may have prevented serious head trauma or brain injury.

Going beyond just the vehicle code “rules”, any motor vehicle accident including motorcycle wrecks have to be analyzed by a quality motorcycle injury lawyer to determine whether the incident involved negligence. As I have discussed more at length here, California is a comparative fault state. This means that a judge or jury may examine the evidence regarding the incident and make a determination as to how to apportion fault among all parties involved. In some cases, like when a car turns left in front of an oncoming motorcycle, liability is pretty clearly stacked against the driver of the car. Other times, the fault lines may not be as clear. Distances, reaction times of the auto operator and the motorcyclist, ability to possibly avoid the collision, visibility, lighting, speeds of both the car or truck and the motorcycle, and many other factors must be examined. Oftentimes, quality motorcycle injury attorneys will employ accident reconstruction experts to examine the police report, inspect the scene, look at measurements of skid marks and property damage and make a determination as to their opinion on who may have been at fault. However, in the end, it is the judge or jury who gets to hear the evidence and these opinions and decide whether the motorcycle passenger should be entitled to money damages, who should pay this compensation and what percentage of responsibility to parse out.

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