The Motorcycle Safety Scissors: How 50 Years of Car Safety Left Riders Behind
In the first 150 milliseconds of a frontal crash, a modern car deploys a symphony of systems. Pretensioners yank the seatbelt tight. Airbags inflate at 200 mph. Crumple zones collapse in a choreographed sequence that converts kinetic energy into deformed metal. Electronic stability control may have already tried to prevent the crash entirely. The car occupant experiences a violent but engineered event, and walks away from crashes that would have been lethal in 1975.
A motorcyclist in the same 150 milliseconds separates from the bike and becomes a projectile. No crumple zones. No airbags. No seatbelt. Possibly no ABS. In many states, possibly no helmet. The rider hits whatever they hit at whatever speed they were going, minus whatever friction the slide provides.
That asymmetry has been compounding for fifty years, and the FARS data draws it in a shape that looks like an opening pair of scissors.
Each one was a commute that didn’t end, a Sunday ride that someone didn’t come home from.
Drawing the scissors
Plot passenger vehicle occupant deaths as a share of all traffic fatalities from 1975 to 2023 on one line. Plot motorcycle deaths on another. They form an X.
| Year | Passenger Vehicle Share | Motorcycle Share | MC Deaths |
|---|---|---|---|
| 1975 | 69% | 7% | 3,180 |
| 1985 | 68% | 10% | 4,562 |
| 1995 | 76% | 5% | 2,226 |
| 1997 | 77% | 5% | 2,116 |
| 2005 | 72% | 11% | 4,575 |
| 2015 | 64% | 14% | 5,026 |
| 2020 | 62% | 14% | 5,619 |
| 2023 | 59% | 15% | 6,335 |
The 1997 row matters, and it needs context. That year was the absolute trough: 2,116 motorcycle deaths, the lowest since FARS began counting. Motorcycle registrations had fallen through the early 1990s as boomers aged out and before Gen X picked up the habit. From that inflection point to 2023, motorcycle deaths tripled while passenger vehicle deaths fell 25%. Some of that tripling reflects more riders: registrations roughly doubled from ~4 million in 1997 to ~8.6 million by 2023. But even adjusting for exposure, the per-registration fatality rate rose, and the per-VMT gap widened. The scissors aren’t solely an exposure story.[1]
The blades of the scissors opened because one line got pulled down by engineering and the other didn’t. Passenger vehicles absorbed fifty years of compounding safety innovation. Motorcycles absorbed fifty years of nothing.
The 613,000-life technology stack
NHTSA estimated in 2017 that vehicle safety technologies have saved more than 613,000 lives since 1960.[5] The three biggest individual technologies account for over 406,000; the remainder comes from crumple zone design, side-impact protection, roof strength standards, and other structural improvements. Here’s the breakdown:
| Technology | Lives Saved | Mandate Year | Motorcycle Equivalent |
|---|---|---|---|
| Seatbelts | 330,000+ | 1968 | None |
| Frontal airbags | 70,059 | 1998 | None |
| ESC | ~6,200 | 2012 | None |
| AEB | ~360/year (projected) | 2029 | 12 pp less effective at detecting motorcycles |
Zero of those technologies apply to the person on two wheels. Seatbelts are a non-starter on a motorcycle. Airbags exist on exactly one production model (Honda Gold Wing) as an optional extra. ESC doesn’t translate to two-wheel dynamics. And AEB, the latest mandate coming in 2029, actually makes things worse for riders who share the road.
IIHS tested AEB systems and found they reduce rear-end crashes with other passenger vehicles by 53%. With motorcycles, that drops to 41%.[3] Motorcycles are smaller, narrower, and less reflective than cars. Camera and radar systems trained on car-sized objects have a harder time identifying them. David Kidd, IIHS Senior Research Scientist, said it plainly: the sensors weren’t designed with motorcycles in mind.
If AEB worked equally well for motorcycles, roughly 6,000 additional crashes per year would be prevented. Instead, the newest car safety mandate perpetuates the pattern: technology optimized for car-shaped things protecting car-shaped things from other car-shaped things.
ABS: the proven fix that America won’t require
Motorcycle ABS works. It isn’t theoretical. IIHS published the largest study on the subject and found that ABS reduces fatal motorcycle crashes by 22%.[2]
The European Union mandated ABS for all motorcycles over 125cc in 2016. So did Japan, Brazil, Taiwan, Australia, New Zealand, India, and the UK. The United States has no such requirement.
IIHS first petitioned NHTSA to mandate motorcycle ABS in 2013. They petitioned again in November 2023, a decade later, this time joined by HLDI.[6] The National Transportation Safety Board has also recommended mandatory motorcycle ABS. NHTSA has taken no action in over ten years of petitions from the two most prominent safety research organizations in the country.
For context on how fast NHTSA can move when it wants to: the AEB mandate for passenger vehicles went from proposed rule to final rule in under three years. Motorcycle ABS has been sitting in regulatory limbo since the Obama administration.
28 times deadlier, per mile
NHTSA publishes a statistic that should be in every motorcycle advertisement and never is: per vehicle mile traveled, motorcyclists are roughly 28 times more likely to die than passenger vehicle occupants in 2023 (up from the commonly cited 22 times based on earlier data).[4]
That multiplier has likely widened since the 1990s, because the denominator (car occupant death rate per VMT) keeps falling while the numerator (motorcycle death rate per VMT) has stayed roughly flat or risen. Cars got dramatically safer. Motorcycles, in the structural safety sense, are about where they were when Honda released the CB750 in 1969.
Riders can buy better gear, better helmets, better tires. But the fundamental physics haven’t changed: 400 to 900 pounds of exposed human and machine, no cage, no restraint, and a contact patch the size of a credit card. Against that, the only mandated safety technology in most of America is a headlight.
The demographic objection
The honest counterargument to the scissors chart: demographics, not technology, explain the divergence. American motorcyclists got older (median age climbed from 27 in 1980 to 50 in 2018), more numerous, and shifted toward bigger machines. Cruisers and touring bikes replaced lightweight standards. More riders logging more miles on more powerful bikes in an aging population produces more fatalities regardless of technology gaps.[2]
This is partially true. In 1982, 4% of fatally injured motorcyclists were over 50. By 2023, roughly a third were. Older riders have slower reflexes, more brittle bones, and longer recovery times. Some fraction of the tripling is simply more people on motorcycles.
But the demographic story can’t explain why proven technology isn’t required. ABS reduces fatal crashes by 22% regardless of rider age. Helmet laws reduce fatality risk by 37-42% regardless of demographics.[2] Only 17 states plus DC have universal helmet laws. IIHS estimates that weak helmet law coverage accounts for more than 22,000 additional motorcyclist deaths since 1975.[2]
Demographics shift the baseline. Policy failures compound on top of it. If America had mandated motorcycle ABS in 2016 like the EU, and if every state required helmets, the scissors chart would still show divergence, but the motorcycle blade would be measurably less steep.
What the scissors look like from inside a car
There’s a second way to read the data that implicates car drivers directly. Sixty-five percent of fatal motorcycle crashes involve a collision with another vehicle, and in a majority of those crashes, it’s the other driver who violated the motorcyclist’s right of way.[1] The typical scenario: a car turns left across the path of an oncoming motorcycle. The car driver says they didn’t see the bike.
They probably didn’t. Human visual search is calibrated by what we expect to find. Drivers scanning for car-sized threats at intersections genuinely don’t perceive motorcycle-sized ones at the same rate. Researchers call it inattentional blindness, and decades of Looked-But-Failed-To-See studies confirm it persists even when riders wear high-visibility gear.
AEB was supposed to help with this. It did, for car-on-car crashes. For car-on-motorcycle crashes, the 12-percentage-point gap means the sensors share the same blind spot as the human behind the wheel.
Supersport outliers and the licensing gap
Not all motorcycles die at the same rate. Supersport bikes (the 600cc and liter-class machines with power-to-weight ratios that exceed most sports cars) have the highest driver death rates of any motorcycle category.[2] Young men on fast bikes in urban environments produce a fatality rate that makes the 28x average look conservative.
FARS records that 35% of fatally injured motorcycle drivers had no valid motorcycle license, compared to 18% for car drivers.[1] In what other transportation category would a third of fatal crashes involve unlicensed operators and everyone just shrugs?
Licensing reform alone won’t close the scissors. But the gap between motorcycle and car licensing standards is another indicator that the regulatory apparatus treats two-wheeled transportation as an afterthought.
The math going forward
In 2023, motorcycles represented 3% of registered vehicles and 0.6% of vehicle miles traveled, but 15% of all traffic deaths.[1][4] Passenger vehicles will keep getting safer. AEB mandates in 2029, vehicle-to-vehicle communication, eventually autonomous driving. Each improvement pulls the top blade of the scissors further down. Each improvement does nothing for the bottom blade.
What would close the scissors
A short list, none of it technologically ambitious:
- Federal motorcycle ABS mandate (22% fatal crash reduction, already law in the EU and eight other markets)
- Universal helmet laws (37-42% fatality reduction, currently only 17 states + DC)
- AEB motorcycle detection standards (close the 12-pp effectiveness gap before the 2029 mandate takes effect)
- Graduated motorcycle licensing (address the 35% unlicensed fatality rate)
- V2X transponders on motorcycles (make riders electronically visible to car systems)
None of these require inventing anything new. ABS exists. Helmets exist. Better AEB calibration exists.
The gap between what we know and what we require is a decade of ignored petitions and 50 states that can’t agree on helmets.
Methodology and limitations
Fatality shares are calculated from IIHS compilations of FARS data, 1975-2023. FARS only counts crashes where someone dies. Everything below that threshold is invisible to this data.
The scissors chart compares shares of a declining total (total traffic deaths fell from ~44,500 in 1975 to ~40,990 in 2023), so absolute numbers and percentages tell slightly different stories. The 28x per-VMT comparison uses NHTSA estimates that rely on FHWA travel data; motorcycle VMT is self-reported and likely understated.
Motorcycle registrations roughly doubled from ~4 million in 1997 to ~8.6 million by 2023, which means some share of the rising death count reflects increased exposure rather than technology exclusion. Disentangling the relative contributions of exposure growth, demographic shifts, and regulatory gaps requires per-registration trend analysis beyond the scope of this piece. The technology gap explains why motorcycle fatality rates didn’t fall in step with cars; it doesn’t single-handedly explain why absolute deaths tripled.
AEB effectiveness figures come from a single IIHS study of specific AEB systems and may not generalize across all manufacturers. The 22,000+ excess deaths from weak helmet laws is a cumulative IIHS estimate based on annual NHTSA “lives that could have been saved” reports, using counterfactual modeling. Demographic data on median rider age comes from the Motorcycle Industry Council, most recently updated in 2018. The IIHS has framed motorcycle safety as partly a technology and regulatory gap for over a decade through their ABS petition work; this analysis builds on that framing by visualizing the divergence across the full 1975-2023 FARS dataset.
One comparison this piece doesn’t make but should: the EU mandated motorcycle ABS in 2016. The European Transport Safety Council’s 2025 PIN report confirms that motorcyclists “remain among the most vulnerable road users in Europe,” still accounting for a disproportionate share of fatalities despite the mandate.[7] This suggests ABS alone, while effective, doesn’t close the scissors entirely; it narrows one blade. A full EU vs. US comparative analysis of motorcycle fatality share trends pre- and post-2016 would either validate the technology-exclusion thesis or reveal that the problem runs deeper than any single regulation. That comparison is beyond the scope of this piece, but the data exists and should be done. Statistical analysis performed with computational assistance.