Evidence quality 4.75/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 5/5
- D2 Source authority
- 5/5
- D3 Arithmetic
- 5/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 5/5
- D6 Prose
- 5/5
- D7 Perception honesty
- 4/5
- D8 Caveat completeness
- 5/5
● your factors — click this risk ▾ to reveal
- Your factors
≈ As likely as
Perceived
Cyclists who ride regularly report that being hit by a car is the dominant fear shaping their route choices, riding posture, and willingness to cycle at all. The mental model is roughly: drivers are distracted, roads are narrow, one mistake ends everything. What the intuition rarely tracks is the difference between per-trip risk, per-mile risk, and lifetime risk for a person who cycles a specific number of miles per year. The fear operates at the level of vividness — one fatal dooring or overtaking collision is easy to imagine — rather than at the level of frequency.
Rough estimate: feels very high — many regular cyclists consider it a near-certainty over a cycling lifetime
Source: editorial intuition, not polled
Actual
~7.9 deaths per 100 million miles cycled (US, NTSB 2019 study)
US pedalcyclists in motor vehicle traffic crashes (NHTSA FARS, NTSB 2019 study)
Show derivation
The NTSB 2019 safety study reported a yearly US bicyclist fatality rate of 79 bicyclist fatalities per billion miles bicycled (7.9 per 100 million miles), citing Santacreu (2018). NHTSA FARS recorded 1,166 pedalcyclist fatalities in motor vehicle traffic crashes in 2023 (up about 4% from 1,117 in 2022, the highest count in the series), consistent with the ~1,000–1,200 range across 2019–2023. Normalizing to a "regular road or urban cyclist" who averages 2,000 miles per year over 40 active cycling years (ages 18–58) gives a lifetime exposure of 80,000 miles. At 7.9 deaths per 100 million miles, that yields a lifetime probability of 80,000 × 7.9e-8 ≈ 0.0063, or about 1 in 158. The uncertainty band reflects variation in annual mileage and trip type: a casual cyclist doing 1,000 miles/year for 30 years (30,000 miles) sits near 0.0024; a high-mileage road cyclist doing 4,000 miles/year for 50 years (200,000 miles) sits near 0.016. The per-mile fatality rate for cyclists is several times that of motor vehicle occupants, reflecting the lack of occupant protection, not a fundamentally more dangerous activity per trip — most Americans cycle very few miles annually.
Caveats: The per-mile fatality rate from the NTSB 2019 study (79 deaths per billion miles…
The per-mile fatality rate from the NTSB 2019 study (79 deaths per billion miles) is the best available US figure but relies on bicycle VMT estimates that have significant uncertainty — the US does not systematically measure bicycle miles traveled the way it measures motor vehicle miles. NHTSA's annual fatality count is accurate (FARS captures all motor-vehicle-involved deaths), but the denominator (total bike miles) is estimated from travel surveys with wide confidence intervals. The lifetime calculation is also sensitive to assumed annual mileage: doubling the assumed mileage doubles the lifetime probability. Cyclists who primarily ride on protected infrastructure (separated bike lanes, off-road trails) face lower exposure than those riding on open roads. Alcohol involvement (rider or driver) is reported in 34% of fatal crashes, indicating the underlying distribution is not uniform. The 1 in 158 headline applies to a specific profile; it is not a population-average figure for all US adults, which would be much lower because most Americans cycle very infrequently.
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The headline figure from the NTSB’s 2019 safety study — the agency’s first comprehensive analysis of bicyclist crash risk in nearly five decades — is roughly 79 deaths per billion miles cycled, or about 7.9 per 100 million miles. NHTSA’s Fatality Analysis Reporting System recorded 1,166 pedalcyclist deaths in motor vehicle traffic crashes in 2023, a 4 percent increase over 2022 and nearly double the 2010 low. For a regular road or urban cyclist averaging 2,000 miles per year over 40 active cycling years — 80,000 miles of lifetime exposure — that rate translates to a lifetime fatality probability of roughly 1 in 158, or about 0.6%. That is not trivial, but it is also not the “near-certainty over a lifetime” that most regular cyclists privately believe they are running.
The comparison that puts the number in context: the per-mile fatality rate for cyclists is several times that of motor vehicle occupants. That gap is real and reflects the absence of crumple zones, airbags, and steel cages around a cyclist. What it does not mean is that cycling is proportionally as dangerous as driving per trip — the average car trip is many times longer than the average bike trip, and the typical American cyclist logs very few miles annually. The IIHS notes that deaths among adult cyclists (20 and older) have increased almost fivefold since 1975, which runs in the opposite direction from the steady long-term decline in motor vehicle occupant death rates over the same period. Eighty-one percent of the fatalities occur in urban areas — the dense settings where cyclists and fast-moving vehicles share space with the least physical separation.
Where the intuition goes wrong is less in direction than in magnitude. Cycling on open roads with motor vehicle traffic does carry a real and measurable fatal risk, and the NTSB’s international comparison is pointed: among the 13 European countries and the United States that Santacreu (2018) measured over 2011–2015, the US rate ranked second only to Italy — a spread that tracks almost exactly with infrastructure investment rather than with the inherent danger of the activity. The 53% of fatalities that occur in dark conditions, and the 34% involving alcohol in either the rider or the driver, identify the highest-leverage modifiable factors. Lighting and route choice on open roads move the personal risk number substantially. The 1 in 158 headline applies to a specific exposure profile; a casual cyclist on shared-use paths sits much closer to the low end of the uncertainty range than the headline, and a high-mileage road cyclist on unlit rural roads sits well above it.
Related tidbits
Being killed by a car while cycling runs about 1 in 195 for a regular road rider over a cycling life. Many cyclists imagine it as near-certain; the per-mile risk is real but far below that.
Claim ledger
Every number below is what each source reported, with the verbatim quote we relied on and how we arrived at our figure. Click any link to verify directly.
3/3 sources independently verified verbatim against the cited source
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[1] National Transportation Safety Board (NTSB) — Bicyclist Safety on US Roadways: Crash Risks and Countermeasures (SS-19/01) Verified
Bicyclist Safety on US Roadways: Crash Risks and Countermeasures (SS-19/01)- Statistic
79 bicyclist fatalities per billion miles bicycled in the US (7.9 per 100 million miles); 806 bicyclists died in crashes with motor vehicles in 2017; bicyclist fatalities reached their lowest level of 623 in 2010- Excerpt
“"Santacreu (2018) provided bicyclist fatalities data per distance bicycled for 13 European countries and the United States from 2011 through 2015. Figure 4 shows that the yearly US bicyclist fatality rate of 79 bicyclist fatalities per billion miles bicycled ranked second only to Italy." ”
- Source data from
- 2019-11-01
- Accessed
- 2026-05-04 · archived copy
- Verification
- Excerpt independently re-fetched and confirmed word-for-word against the cited source during our grounding audit.
- Calculation
- The NTSB figure of 79 deaths per billion miles (= 7.9 per 100 million miles) is the primary exposure-normalized rate used for the native statistic. To convert to a lifetime probability for a regular cyclist, multiply the per-mile rate by total lifetime miles: 80,000 miles (2,000/year × 40 years) × 7.9e-8 per mile ≈ 0.0063. This report was also the NTSB's first comprehensive bicyclist-safety analysis since 1972 — a 47-year gap the report itself notes — which is why the body text describes it as "nearly five decades" since the prior review.
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[2] National Highway Traffic Safety Administration (NHTSA), National Center for Statistics and Analysis — Traffic Safety Facts 2023 Data: Bicyclists and Other Cyclists (DOT HS 813 739) Verified
Traffic Safety Facts 2023 Data: Bicyclists and Other Cyclists (DOT HS 813 739)- Statistic
1,166 pedalcyclist fatalities in motor vehicle traffic crashes in 2023, representing 2.9% of all traffic fatalities; 81% occurred in urban areas; 62% at non-intersection locations; 87% of those killed were male- Excerpt
“"In 2023 there were 1,166 pedalcyclist fatalities, accounting for 2.9 percent of all traffic fatalities." ”
- Source data from
- 2025-01-01
- Accessed
- 2026-05-04 · archived copy
- Verification
- Excerpt independently re-fetched and confirmed word-for-word against the cited source during our grounding audit.
- Calculation
- NHTSA FARS 2023 provides the most recent annual fatality count. The 1,166 figure is used to confirm that the NTSB per-mile rate remains plausible: if US cyclists collectively travel ~18 billion miles/year (rough estimate from American Community Survey trip data and NHTS), then 1,166 / 18,000,000,000 ≈ 6.5 deaths per 100 million miles, consistent with the NTSB figure. NHTSA FARS is the upstream source for all US traffic fatality counts and is treated as the primary authority.
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[3] Insurance Institute for Highway Safety (IIHS) — Fatality Facts 2023: Bicyclists Verified
Fatality Facts 2023: BicyclistsSee all 2 Likelier entries citing this source →
- Statistic
1,163 bicyclists killed in crashes with motor vehicles in 2023; about 2%-3% of motor vehicle crash deaths are bicyclists each year; deaths among bicyclists age 20 and older have increased almost fivefold since 1975- Excerpt
“"A total of 1,163 bicyclists were killed in crashes with motor vehicles in 2023. ... Each year about 2%-3% of motor vehicle crash deaths are bicyclists." ”
- Source data from
- 2024-12-01
- Accessed
- 2026-05-04 · archived copy
- Verification
- Excerpt independently re-fetched and confirmed word-for-word against the cited source during our grounding audit.
- Calculation
- IIHS uses a slightly different coding methodology than NHTSA FARS, producing a 2023 figure of 1,163 vs NHTSA's 1,166. Both are used as corroboration that the annual US cyclist fatality count from motor vehicle crashes is reliably in the 1,100–1,200 range in recent years. The IIHS trend data also establishes that fatality counts have risen substantially since 2010 (from a low near 620), which means the per-mile rate used may slightly understate current risk if cycling miles have not grown proportionally.