Comparative Negligence in PA Motorcycle Cases: How Fault Percentage Affects Compensation

I am Sean Quinlan, and if you understand one legal rule about your Pennsylvania motorcycle case, make it this one. Liability is not a yes or no question. It is a percentage, and in rider cases that percentage is where the money is won and lost.

The rule: 42 Pa. C.S. § 7102

Pennsylvania follows modified comparative negligence with a 51 percent bar. In substance:

• Contributory negligence does not bar recovery so long as the injured person’s fault is not greater than the fault of the defendants against whom recovery is sought.
• Any damages awarded are reduced in proportion to the injured person’s share of fault.
• If the injured person’s share exceeds 50 percent, recovery is barred entirely.

The arithmetic is unforgiving. On a $600,000 verdict: at 10 percent fault you recover $540,000; at 30 percent, $420,000; at 50 percent, $300,000; at 51 percent, nothing. That cliff at 51 is why the defense in a rider case often does not attack liability head-on. It just needs to push you one point over.

How the jury actually does it

The verdict slip asks whether each party was negligent, whether that negligence was a factual cause of harm, the total damages without reduction, and then the percentage attributable to each party. The judge applies the reduction. Where multiple defendants share fault, the Fair Share Act provisions of § 7102 govern how liability is apportioned among them, with joint liability preserved in certain categories including intentional misrepresentation, an intentional tort, releasing a hazardous substance, liquor code violations, and defendants found 60 percent or more liable.

What the defense argues to move a rider’s percentage

• Speed. Almost always alleged, usually with no support beyond injury severity. Severity reflects the absence of a passenger compartment, not velocity.
• Lane position. The suggestion that the bike came from between cars, invoking 75 Pa. C.S. § 3521, which prohibits operating between lanes while also entitling a motorcycle to full use of its lane.
• Reaction and avoidance. That a more skilled rider would have braked or swerved clear — usually ignoring realistic perception-reaction time within the available distance.
• Conspicuity. That dark gear or lane choice made the rider hard to see, quietly transferring the driver’s duty to look onto the person who was looked past.
• The helmet. Even where riding unhelmeted was lawful under 75 Pa. C.S. § 3525, it is raised because it signals risk-taking. It is at most a damages-causation issue for head injury, not a cause of the collision.
• Experience or licensure. Any gap in endorsement, training, or registration offered as evidence of general carelessness.

What moves it back

Percentages respond to physical evidence, not to argument.

• Reconstruction from scene evidence — gouge marks, scrape trails, debris fields, and crush geometry produce a calculated speed that ends the speeding theme.
• Event data recorder download from the other vehicle, showing its pre-impact speed, braking, and throttle. This is destroyed when the car is salvaged; preservation letters have to go out in days.
• Statutory duty framing. Tie the defendant to a specific rule they broke — the left-turn yield duty at 75 Pa. C.S. § 3322, the signal requirement at § 3334, the reasonable-speed requirement at § 3361, or the lane-deprivation prohibition in § 3521.
• Perception evidence explaining looked-but-failed-to-see and closing-speed misjudgment, which recasts I never saw the motorcycle as an admission.
• Sight-line photography from the driver’s actual eye position at the same hour, showing the bike was there to be seen.
• Voir dire that surfaces rider bias instead of leaving it to operate silently in deliberation.
• Rider credibility — safety-course completion, clean record, forward-facing camera footage, and gear that was actually worn.

Two related points riders should know

First, comparative fault reduces damages that you were entitled to recover in the first place, and for riders that ordinarily includes non-economic damages: under 75 Pa. C.S. § 1705(d)(3), a person injured while operating a vehicle that is not a private passenger motor vehicle generally is not bound by a limited tort election.

Second, none of this matters if the claim is untimely. Two years under 42 Pa. C.S. § 5524, and six months’ written notice under 42 Pa. C.S. § 5522 if a government entity may share responsibility.

What this means for how you behave after a crash

Every recorded statement you give the other driver’s insurer is an attempt to build your percentage out of your own words — how fast you think you were going, when you first saw the car, what you tried to do. You are not required to give one. Say nothing, preserve the bike and gear, photograph the scene, and let the physical evidence set the number.

More reading: my Pennsylvania motorcycle accident lawyer page, the PA comparative negligence FAQ, the PA motorcycle accident FAQ, and the motorcycle versus car accident claims comparison.

Talk to me about your fault percentage

If an adjuster has already assigned you a share of the blame, that number is negotiable and it is usually not supported by anything. Consultations are free and confidential, and there is no fee unless we recover. Request a free case review.

Serving injured Pennsylvanians in: Philadelphia · Pittsburgh · Harrisburg.

You may be responsible for certain case costs and expenses in addition to the fee, as explained in your written fee agreement.