The Biggest Sedans in America Are Also the Deadliest. It’s Not a Coincidence.

A Buick Park Avenue weighs 3,778 pounds. It stretches 17 feet. It has more front overhang than most modern SUVs and a frame that was engineered when Clinton was president. By every mechanical measure, it should absorb a crash better than a Honda Civic. And yet: 88.2% of Park Avenue crashes recorded in FARS resulted in a fatality.^[1] The Civic? 68.1%.

I grouped nine full-size sedans overwhelmingly bought by drivers over 60: the Toyota Avalon, Lincoln Town Car, Buick LeSabre, Park Avenue, LaCrosse, Lucerne, Cadillac DeVille, Ford Crown Victoria, and Mercury Grand Marquis. Then I computed a simple ratio: deaths divided by FARS-recorded crashes. Combined: 74.2% lethality across 6,428 crashes producing 4,772 deaths. Run the same calculation on ten popular modern crossovers and you get 53.0%. Entry-level sedans like the Civic and Corolla land at 65.3%.^[1]

Physics says mass protects occupants. IIHS research confirms it. So why do the heaviest sedans have the worst outcomes?

Because the occupants are the variable, not the car.

A 2015 IIHS study by Jessica Cicchino found that the primary driver of older adults' elevated fatal crash rates per mile isn't that they crash more often. It's fragility, defined as risk of death given a crash of equal severity.^[2] Fragility begins increasing around middle age and accelerates after 70. Reduced bone density. Slower healing. Lower physiological reserve. The human body becomes its own crumple zone, and no amount of steel around it fully compensates.

Impairment data makes the paradox worse. Across our nine retiree sedans, 21.3% of drivers in fatal crashes tested positive for alcohol or drugs^[1] -- almost identical to the dataset average of 20.0%. No excess drinking. No excess drugs. These crashes aren't caused by impairment. They're sober 74-year-olds getting T-boned at intersections, which tracks with IIHS findings that the most frequent error by crash-involved drivers over 70 is "inadequate surveillance" -- looking but not seeing, misjudging gaps.^[2] Average impairment, extraordinary lethality. Something else is doing the killing.

The LeSabre is the starkest example: 1,344 deaths from 1,633 FARS crashes, an 82.3% conversion rate. Meanwhile, a Toyota RAV4 -- lighter, smaller, newer -- converts only 49.8% of its FARS crashes into fatalities. The RAV4's occupants walk away because they're, on average, 35 and resilient. The LeSabre's occupants don't because they're 72 and not.

The Uncomfortable Math

Every lethality ratio here carries a methodological asterisk: FARS only records fatal crashes. So "lethality" means the death rate among crashes where at least one person died, not all crashes. A vehicle with more multi-fatality crashes would score higher even with equally survivable occupants. That caveat matters.

But there's a bigger confound worth stating at full strength: these are old cars. Park Avenue was discontinued in 2005. LeSabre ended the same year. Grand Marquis lasted until 2011. Every one of them predates mandatory electronic stability control (2012), advanced side-impact airbags, and modern structural design. Their high lethality could reflect the age of the steel rather than the age of the skeleton inside it.

Probably, it's both. And that's the crueler finding. Old people drive old cars, and the combination is multiplicative. An aging body in an aging vehicle isn't twice as vulnerable -- it's something worse, because the specific crash types older drivers are prone to (low-speed intersection collisions, left-turn misjudgments) are precisely the ones where outdated side-impact protection fails most catastrophically.

NHTSA estimated 39,345 traffic deaths in 2024, down 3.8% from 2023.^[3] The 70-and-older cohort accounted for 5,502 of them. The cohort is growing: 40 million Americans are now over 70, and 88% hold driver's licenses, up from 73% in 1997.^[2] They're driving more miles per year than ever. And 47% fewer of them die per capita than in 1975, thanks to better vehicles, better roads, and voluntary self-restriction of nighttime driving.

But the fragility tax hasn't changed. You can engineer a car to absorb 40 mph of frontal impact. You can't engineer a femur to do the same at 78 years old. And as long as the American fleet includes millions of 15-to-25-year-old full-size sedans driven by their original elderly owners, the lethality numbers will stay exactly where they are.