The Verification Venue · a fear pointed at the wrong vehicle
The Trip That Flips the Fear
You grip the armrest at takeoff and let your guard down behind the wheel. For the same point-to-point trip, that is exactly backwards: the drive is the part that should scare you, not the flight.
A micromort is a clean way to hold danger in your hand: one micromort is a one-in-a-million chance of sudden death (Ronald Howard, 1980; popularised by David Spiegelhalter). It turns "is flying safer than driving?" into arithmetic. Type in a trip below and watch the micromorts pile up for each way of making it — every number recomputed, live, from the raw 2023 death counts, not a quoted slogan.
Same distance for both — the fair, like-for-like question: per mile travelled per person, which is the gamble?
For this trip, driving carries 114× the death risk of flying.
The bars don't lie because the rates underneath them are taken from public counts, not vibes. The flight's risk is so much smaller that it nearly vanishes — and that's the point: cruising at 35,000 feet is one of the safest things a human can do per mile. The danger you feel is real danger, just attached to the wrong half of the journey.
The check — every number recomputed in front of you
1. The U.S. road rate, from the raw 2023 counts (NHTSA FARS deaths ÷ FHWA vehicle-miles). Watch "miles per death" fall out of the division — no slogan needed:
2. The fair per-person comparison uses deaths per 100 million passenger-miles (NSC / USAFacts, 2023), so a car seat and a plane seat are measured the same way:
| mode | deaths /100M pax-mi | µmort / mile | miles per µmort |
|---|
—
3. Your trip, plugged through with the slider value above:
The verifier recomputes all of this — the 1.26-per-100M rate, the ~79-mile-per-micromort figure, the ~177× per-mile safety ratio, and the drive-beats-fly verdict for every preset trip — and checks they agree with what this page displays. Run it: node research/the-trip-that-flips-the-fear/verify-the-trip-that-flips-the-fear.mjs
What's idealised here, and what's exactly true
Two denominators, two stories — both shown. The headline road rate (1.26 per 100M) is per vehicle-mile: every road death (drivers, passengers, motorcyclists, pedestrians, cyclists) over all miles driven. That gives ~79 miles per micromort. The drive-vs-fly bars instead use per passenger-mile occupant rates, the only fair way to compare a car seat with a plane seat — there car driving is ~189 miles per micromort. They are different questions, and the choice is itself the lesson.
The "240 miles per micromort" slogan is a kinder, older number. The figure you'll see quoted everywhere (~240–250 miles) implies a death only every ~240 million miles — a rate near 0.42 per 100M, about a third of the 2023 all-road rate. It reflects safer years and/or occupant-only counts. We don't repeat it as today's fact; we audit it against the raw number it disagrees with.
Per mile is one frame, not the only one. Per-mile, flying wins enormously. Per trip or per hour the gap narrows, because a flight covers vastly more miles per hour — and a fair door-to-door comparison should add the drive to and from the airport (which is, ironically, the riskiest leg of flying). The instrument deliberately fixes distance and asks the per-mile question; it does not model the airport drive.
The per-flight floor is a transparent free choice. Almost all aviation risk sits in take-off, climb, approach and landing, not cruise, so we add a representative 0.013 micromort fixed cost per flight. It barely moves a long trip, but it means that below roughly 2.5 miles the (absurd) flight would out-risk the drive — an honest boundary, not a hidden one.
The average hides enormous spread. Driving risk varies by an order of magnitude with age, sobriety, time of day, road type and seatbelt use; a sober, belted, daytime, freeway driver is far safer than the average, and a drunk 2 a.m. teenager far worse. Commercial aviation's per-mile rate is dominated by rare catastrophic events, so single years are noisy — the figures here are the published 2023 annual rates, and the ordering (drive ≫ fly per mile) is robust to any reasonable year you pick.