The 24 Hours
You don't fight the body's lowest point. You wait it out.
At 4 am, the body is at its lowest point of the day. Core temperature falls to its minimum and alertness follows. Reflexes slow down: at 100 km/h, half a second is 14 metres. Between 2 and 6 am, sleepiness-related crashes are the most frequent. It is not weakness, it is the body's rhythm, and the body is right.
Details 50 s · 9:16 · four languages · generated images, voice and music, declared as such · 2026-09-06 · Drive Awake
The low point passes on its own, but it passes with time, not with willpower: the only thing that shortens it is sleep. If you are on the road at this hour, the useful choice is to stop and sleep, not to arrive sooner. Coffee and an open window move the feeling, not the state of the body.
At 4 am, the body is at its lowest point of the day.
Alertness follows a 24-hour rhythm that does not depend on willpower: around 4 it reaches its lowest point. On an empty road the body makes no exception.
Wright, Hull, Czeisler 2002 · DOI 10.1152/ajpregu.00205.2002
Watch this passage (0:00) →Core temperature falls to its lowest point. Alertness falls with it.
During the night core temperature drops by about half a degree and reaches its minimum between 4 and 5. Alertness follows the same curve: the dashboard cannot see it, the body can.
Kräuchi, Wirz-Justice 1994 · DOI 10.1152/ajpregu.1994.267.3.R819
Watch this passage (0:07) →Reflexes slow down. At 100 km/h, half a second means 14 metres.
At 100 km/h you cover 28 metres every second. Half a second more to react, and braking starts 14 metres further on: the length of three cars.
Watch this passage (0:14) →Between 2 and 6 am, sleepiness-related crashes are most frequent.
Sleepiness-related crashes cluster between 2 and 6, when traffic is lightest. Stopping at a rest area is the choice the body is asking for.
Horne, Reyner 1995 · DOI 10.1136/bmj.310.6979.565
Watch this passage (0:22) →
It is not weakness. It is the body's rhythm, and the body is right.
It is neither weakness nor distraction: it is physiology. Stopping and resting is the right answer, not a failure.
Watch this passage (0:29) →The corrections made to this text, with their date, their reason and the lines they touched.
Revisions that concern the whole series are in the campaign diary →
The same lines you see in the video, side by side. This is where the gaps between languages show: a turn of phrase that does not hold, a word out of place, a figure that changes weight. If you find one, the button next to the line opens the report with hour, language and minute already filled in. All episodes on one page →
line 1 0:01
IT
Alle 4 il corpo è al punto più basso della giornata.
FR
À 4 heures, le corps est au point le plus bas de la journée.
DE
Um 4 Uhr ist der Körper am tiefsten Punkt des Tages.
EN
At 4 am, the body is at its lowest point of the day.
line 2 0:08
IT
La temperatura interna scende al minimo. Con lei, la vigilanza.
FR
La température interne descend au minimum, et la vigilance avec elle.
DE
Die Kerntemperatur sinkt auf ihr Minimum. Mit ihr die Wachsamkeit.
EN
Core temperature falls to its lowest point. Alertness falls with it.
line 3 0:14
IT
I riflessi rallentano. A 100 all'ora, mezzo secondo sono 14 metri.
FR
Les réflexes ralentissent. À 100 km/h, une demi-seconde, c'est 14 mètres.
DE
Die Reflexe werden langsamer. Bei 100 km/h ist eine halbe Sekunde 14 Meter.
EN
Reflexes slow down. At 100 km/h, half a second means 14 metres.
line 4 0:23
IT
Tra le 2 e le 6 gli incidenti da sonnolenza sono i più frequenti.
FR
Entre 2 h et 6 h, les accidents liés à la somnolence sont les plus fréquents.
DE
Zwischen 2 und 6 Uhr sind Unfälle durch Schläfrigkeit am häufigsten.
EN
Between 2 and 6 am, sleepiness-related crashes are most frequent.
line 5 0:30
IT
Non è debolezza. È il ritmo del corpo, e ha ragione lui.
FR
Ce n'est pas une faiblesse. C'est le rythme du corps, et il a raison.
DE
Das ist keine Schwäche. Es ist der Rhythmus des Körpers, und er hat recht.
EN
It is not weakness. It is the body's rhythm, and the body is right.
line 6 0:37
IT
Il minimo assoluto non si combatte. Si aspetta.
FR
Le minimum absolu ne se combat pas. On l'attend.
DE
Das absolute Tief bekämpft man nicht. Man wartet es ab.
EN
You don't fight the body's lowest point. You wait it out.
A question about this hour · 04:00
Around four in the morning, have you ever had to choose between waiting and setting off? What influenced your decision?
There is no right answer: we are interested in the experience of people who drive, including for work.
The conversations happen on our channels. When there is one about this hour, we will link to it here.
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This episode is online. If something feels off, a word, a figure, a detail in the image, tell us below: two lines are enough. We read everything, and every correction goes into the diary, with its date.
We read every message. If it becomes a correction, the text changes here on the site and goes into the episode's diary, with its date and its reason. Corrections already made →
2026-09-06 · Drive Awake
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