Colorado's diverse terrain—from mountain passes to high desert highways—attracts motorcyclists year-round. Motorcycle registrations in Colorado have increased more than 60 percent since 2000, according to the Colorado Department of Transportation. With that growth comes a corresponding rise in motorcycle crashes and serious injuries. Understanding Colorado motorcycle laws is critical both for safety and for evaluating liability when a collision occurs.
General Traffic Laws Apply to Motorcycles
Motorcyclists in Colorado must obey all standard traffic laws that apply to passenger vehicles. Speed limits, stop signs, traffic signals, right-of-way rules, and DUI prohibitions apply equally to riders. Motorcycles are considered vehicles under Colorado law, which means operators must carry a valid motorcycle endorsement on their driver's license and maintain required insurance coverage.
Off-highway recreation is permitted in designated areas, but when riding on public roads, motorcyclists have the same duties as any other driver. Operating a motorcycle in a reckless or unsafe manner can result in citations, and violations may affect fault determinations in a personal-injury claim.
Lane Splitting Is Prohibited
Lane splitting—riding between lanes of traffic or overtaking another vehicle within the same lane—is illegal in Colorado. This prohibition applies even when traffic is stopped or moving slowly. Riders accustomed to California's permissive lane-splitting rules must adapt when riding in Colorado.
Violating the lane-splitting prohibition can lead to a traffic citation. In the context of a collision, evidence that a motorcyclist was lane splitting may be used to argue comparative negligence, potentially reducing the rider's recovery under Colorado's modified comparative fault rule.
Clinging and Towing Are Unlawful
Colorado law prohibits motorcyclists from attaching themselves to or holding onto another moving vehicle. This practice, sometimes called "clinging" or "skitching," is dangerous and illegal. A rider may not be towed by or grasp any part of a car, truck, or other vehicle while on the roadway.
Lane Sharing (Co-Riding) Is Permitted
While lane splitting is prohibited, lane sharing between two motorcycles riding side by side in a single lane—commonly called co-riding—is legal in Colorado. No more than two motorcycles may share one lane at the same time. Motorcyclists are not required to share a lane; a single rider has the right to use an entire lane, just as any other vehicle does.
Motorists must respect this right. A common cause of motorcycle crashes is a driver merging into or turning across a lane occupied by a motorcycle, often because the driver failed to see the rider or misjudged the motorcycle's speed and position.
Helmet Laws in Colorado
Colorado does not require adult motorcyclists to wear helmets. Riders age 18 and older may choose whether to wear protective headgear. However, all riders and passengers under the age of 18 must wear a helmet that meets federal safety standards.
While helmets are not legally required for adults, wearing one significantly reduces the risk of traumatic brain injury and death in a crash. The absence of a helmet does not, by itself, bar an injured rider from recovering damages in Colorado. Defendants sometimes argue that failure to wear a helmet contributed to the severity of injuries, but Colorado courts have generally held that helmet use is not admissible to prove contributory negligence in causing the collision itself. The issue may arise, however, in disputes over the extent or cause of specific head injuries.
Passenger Requirements
Motorcycles may carry passengers only if the bike is designed and equipped to do so. The motorcycle must have a permanent passenger seat and footrests for the passenger. Passengers under 18 must wear a helmet, as noted above. Carrying a passenger on a motorcycle not designed for two riders, or without proper equipment, violates Colorado law and creates serious safety risks.
Headlight and Equipment Requirements
Colorado requires motorcycles to have at least one headlight and one taillight. The headlight must be illuminated whenever the motorcycle is in operation, day or night. This daytime headlight requirement is specific to motorcycles and helps increase visibility to other drivers.
Motorcycles must also be equipped with:
- At least one rearview mirror
- Working brakes
- A muffler (excessively loud exhaust systems are prohibited)
- Turn signals if the motorcycle was manufactured with them or if the model year requires them
Handlebars may not be positioned higher than the rider's shoulders. Enforcement of equipment violations varies, but non-compliant equipment can contribute to a crash or hinder a rider's ability to respond to hazards.
Eye Protection
Riders and passengers must wear eye protection unless the motorcycle is equipped with a windscreen. Approved eye protection includes goggles, glasses, or a face shield. This requirement reduces the risk of debris, insects, or wind impairing the rider's vision.
Licensing and Endorsements
Operating a motorcycle on Colorado roads requires a valid driver's license with a motorcycle endorsement (class M). Riders may obtain the endorsement by passing a written test and an on-cycle skills test, or by completing an approved motorcycle safety course. Riding without the proper endorsement is a traffic violation and can complicate insurance claims after a crash.
Insurance Requirements
Motorcyclists must carry liability insurance meeting Colorado's minimum coverage requirements. As of this writing, those minimums are $25,000 per person for bodily injury, $50,000 per accident for bodily injury, and $15,000 for property damage. These minimums are often inadequate to cover serious injuries in a motorcycle crash. Riders should consider higher liability limits and uninsured/underinsured motorist (UM/UIM) coverage to protect themselves if struck by a driver with little or no insurance.
How Violations Affect Injury Claims
When a motorcyclist is injured in a collision caused by another driver's negligence, the rider may recover compensation for medical bills, lost income, pain and suffering, and other damages. However, Colorado applies a modified comparative negligence rule: if the injured party is found 50 percent or more at fault, no recovery is allowed. If fault is less than 50 percent, damages are reduced by the percentage of fault attributed to the injured party.
Defense attorneys and insurance adjusters often scrutinize whether the motorcyclist violated any traffic laws at the time of the crash. Evidence of speeding, improper lane use, or lack of required equipment may be used to argue comparative fault. Conversely, a defendant driver's failure to yield, inattention, or violation of right-of-way rules strengthens the injured rider's claim.
Helmet use, as discussed, generally does not affect liability for causing the crash, but may be raised in disputes over the nature and extent of injuries. Thorough investigation and expert testimony are often necessary to counter these arguments and preserve full recovery.
Common Causes of Motorcycle Crashes in Colorado
Despite legal protections, motorcyclists remain vulnerable on the road. Common crash scenarios include:
- Left-turn collisions: A driver turning left across a motorcyclist's path, often claiming they did not see the rider.
- Lane-change accidents: A driver merging or changing lanes without checking blind spots.
- Rear-end crashes: Following drivers failing to notice a motorcycle slowing or stopping.
- Door strikes: A parked vehicle's door opening into a motorcycle's path.
- Road hazards: Potholes, gravel, debris, or uneven pavement that pose greater danger to two-wheeled vehicles.
In each case, liability turns on whether the at-fault party breached a duty of care and whether that breach caused the motorcyclist's injuries. Preserving evidence—including photographs, witness statements, police reports, and sometimes accident reconstruction—is essential.
Steps to Take After a Motorcycle Crash
If you are involved in a motorcycle collision in Colorado:
- Seek medical attention immediately, even if injuries seem minor. Adrenaline can mask pain, and some injuries manifest hours or days later.
- Report the crash to law enforcement and obtain a copy of the police report.
- Document the scene with photographs of vehicle damage, road conditions, skid marks, and visible injuries.
- Exchange contact and insurance information with all parties, and gather contact details for witnesses.
- Notify your insurance company, but avoid giving a recorded statement or admitting fault until you consult an attorney.
- Preserve all evidence, including damaged gear, helmets, and clothing.
- Keep records of all medical treatment, repair estimates, and lost wages.
Why Legal Representation Matters
Insurance companies often minimize motorcycle injury claims by relying on bias against riders or by exaggerating any comparative fault. An experienced attorney can investigate the crash, identify all liable parties, quantify damages accurately, and negotiate with insurers from a position of strength. If settlement negotiations fail, taking the case to trial may be necessary to secure fair compensation.
If you or a family member has been injured in a motorcycle crash in Colorado, McCormick & Murphy, P.C. offers a free consultation to discuss your case. Our firm works on a contingency basis—no attorney fee unless we recover compensation on your behalf. Contact us today to learn how we can help protect your rights and pursue the recovery you deserve.