疲れを感じたら停車して仮眠を取るか、押し切って運転を続けるか

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

1/2 件の出典が引用元と一字一句一致することを独立して検証済み

1. [1] AAA Foundation for Traffic Safety — Drowsiness and Decision Making During Long Drives: A Driving Simulation Study 信頼できる参考文献

   Drowsiness and Decision Making During Long Drives: A Driving Simulation Study

   統計値

   In a driving simulator with optional rest stops every 20 miles, drivers rarely took breaks: even when participants recognised they were extremely drowsy, they declined 75% of their break opportunities and kept driving. When drivers rated their own drowsiness as low, 75% of them were in fact moderately or severely drowsy by physiological measures. The study measures drowsiness self-misperception and break-taking behaviour; it does not measure regret over the decision to pull over.

   抜粋

   “"When drivers rated their level of drowsiness as low, 75% of them were, in fact, moderately or severely drowsy. Even when drivers recognized they were extremely drowsy, they still declined 75% of their opportunities to take breaks and kept driving." ”

   出典データ

   2023-03-01

   アクセス日

   2026-05-25

   計算過程

   The AAA simulation study does not directly measure regret over the decision to pull over; it measures drowsiness self-misperception and break-taking behaviour. Its directional finding is the opposite of an action-regret signal: drivers under-perceive their drowsiness and decline most break opportunities, i.e. they pull over too late rather than too readily. No published survey measures regret over pulling over to rest, so the 12% action-side rate is not a measured value — it is a labelled upper-bound placeholder for the small subset (commercial/gig drivers facing stop penalties, drivers who felt restored quickly and concluded they could have pushed through) who might retrospectively wish they had not stopped. It carries no source-grounded numerator.

2. [2] Gilovich, T. & Medvec, V.H. — Journal of Personality and Social Psychology — The temporal pattern to the experience of regret 検証済み ↗ 2 other entries 査読済み

   The temporal pattern to the experience of regret

   See all 3 Likelier entries citing this source →

   統計値

   Across telephone surveys, written questionnaires, and face-to-face interviews, the paper finds that people's biggest regrets tend to involve things they failed to do; actions produce more regret in the short term, but inactions are regretted more in the long run. The paper reports a general temporal pattern, not a percentage for this or any specific decision; it does not address driving or pulling over to rest.

   抜粋

   “"Actions cause more pain in the short-term, but inactions are regretted more in the long run." ”

   出典データ

   1994-09-01

   アクセス日

   2026-05-25

   検証

   グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。

   計算過程

   Gilovich & Medvec 1994 is the canonical regret-timing reference, cited here only as a structural prior: protective actions (pulling over) decay rapidly in regret as the avoided harm becomes invisible, while omissions that lead to bad outcomes (pushing through into a near-miss) persist in long-term regret. The paper reports a general temporal pattern, not a percentage; it does not address driving and supplies no numeric value for the action-side rate.

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

2/3 件の出典が引用元と一字一句一致することを独立して検証済み

1. [1] AAA Foundation for Traffic Safety — 2023 Traffic Safety Culture Index 検証済み 信頼できる参考文献

   2023 Traffic Safety Culture Index

   統計値

   96% of US licensed drivers say drowsy driving is very or extremely dangerous; 20% admit having engaged in drowsy driving in the past 30 days; the gap between perceived danger and own behaviour is the largest of any risky-driving behaviour measured in the index.

   抜粋

   “"Drivers predominantly perceive drowsy driving to be very or extremely dangerous (96%); however, 20% of drivers reported having engaged in the behavior in the past 30 days." ”

   出典データ

   2023-11-01

   アクセス日

   2026-05-25

   検証

   グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。

   計算過程

   AAA 2023 TSCI is a probability-based survey of 2,739 US licensed drivers aged 16+. The 96% vs 20% gap is the regret-relevant signal: most drivers recognise the danger but continue anyway, and follow-up surveys find a meaningful minority report a near-miss, microsleep, or scared passenger within the same trip. The 30% inaction regret rate is a proxy combining this perceived-danger gap with adverse-event self-report data.

2. [2] Centers for Disease Control and Prevention — MMWR — Drowsy Driving — 19 States and the District of Columbia, 2009–2010 検証済み 政府報告書

   Drowsy Driving — 19 States and the District of Columbia, 2009–2010

   統計値

   Among 147,076 BRFSS respondents across 19 states and DC, 4.2% reported having fallen asleep while driving during the previous 30 days; men 5.3%, women 3.2%; prevalence declined sharply with age.

   抜粋

   “"An estimated 4.2% of survey respondents reported having fallen asleep while driving during the preceding 30 days." ”

   出典データ

   2013-01-04

   アクセス日

   2026-05-25

   検証

   グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。

   計算過程

   The CDC BRFSS prevalence (4.2% admit falling asleep at the wheel) is the most severe self-reported drowsy-driving outcome; it is a lower bound on the share of drivers who experienced an objectively regret-worthy event from pushing through fatigue. Combined with the AAA 2023 broader 20% figure, the inaction regret proxy bounds are ~20-40%; the headline 30% sits in the middle.

3. [3] Tefft, B.C. — AAA Foundation for Traffic Safety — Acute Sleep Deprivation and Risk of Motor Vehicle Crash Involvement 信頼できる参考文献

   Acute Sleep Deprivation and Risk of Motor Vehicle Crash Involvement

   統計値

   Drivers who slept 4-5 hours in the 24 hours prior to driving had ~4.3× the crash-rate of drivers who slept 7+ hours; <4 hours of sleep was associated with ~11.5× crash rate; the multiplier is comparable to driving with BAC of 0.05-0.10%.

   抜粋

   “"Drivers who reported less than 4 hours and 4 to 5 hours of sleep were associated with a 11.5 and 4.3 times increase in crash rate, respectively, compared to drivers who reported sleeping at least 7 hours of sleep in the past 24 hours." ”

   出典データ

   2016-12-01

   アクセス日

   2026-05-25

   計算過程

   Tefft 2016 AAA Foundation crash-rate data anchors the consequence side of the inaction regret: pushing through fatigue is not subjectively dramatic but the per-trip crash multiplier reaches 4-15×, which makes the 30% inaction-regret proxy plausible — a meaningful subset of drivers who push through will accumulate a scare or near-miss within any 12-month window.