Quinto. When sleepiness had no name.

The case

On 26 July 2016, on the A2 motorway near Quinto, Leventina, a vehicle rear-ended a car stopped in a queue. The crash was fatal. The medical assessment ordered by the cantonal criminal court established that the driver had severe obstructive sleep apnoea syndrome, which he was unaware of and which was diagnosed only after the crash. A real danger that no roadside check could detect: then as now.

The danger without a signal: real, invisible to roadside checks.

Why we are publishing this

Our thoughts are with the victims and their families. We are not recounting this case to commemorate it: the tenth anniversary was an occasion to open a public debate on a still under-recognised road risk, sleepiness at the wheel and the sleep disorders that can cause it. The aim is concrete: to recognise these disorders better as a possible risk factor, to encourage specialist assessment in suspected cases, and to support research into objective indicators. An invitation to those who drive, those who treat and those who work in road safety to look at this danger before it leaves a trace.

From apnoea to microsleep

Obstructive sleep apnoea repeatedly interrupts breathing during the night and fragments rest. In some people it can cause pronounced daytime sleepiness and increase the risk of microsleep at the wheel: brief, involuntary sleep episodes of a few seconds, often without the person noticing. It is a condition that can remain undiagnosed for years. At the wheel, a few seconds are enough.

Tregear et al. 2009, J Clin Sleep Med · DOI 10.5664/jcsm.27662

The IRM Zürich study

In the June 2026 issue of the Journal of Proteome Research, just weeks before the tenth anniversary, the Institute of Forensic Medicine at the University of Zurich (IRM Zürich), Drive Awake’s scientific partner, published a promising result. In twenty healthy young men, across three controlled conditions (one night without sleep, four nights of sleep reduced to six hours and one night of normal rest), a machine-learning classifier distinguished acute sleep deprivation on the basis of twelve molecular features in oral fluid. The four nights of six-hour sleep, by contrast, produced only weak metabolic changes. It is a possible biochemical signature for a condition that until now left no trace.

Scholz et al. 2026, J Proteome Res · DOI 10.1021/acs.jproteome.5c01064

What it does not yet say

It is a laboratory proof of concept, on a small group of healthy volunteers. It is not a validated roadside test, it does not diagnose sleep apnoea, and it cannot reconstruct after the fact what happened at Quinto. The study measures acute sleep deprivation under experimental conditions, not sleepiness at the wheel in real life. Sleepiness linked to apnoea is also chronic: the closest condition studied, sleep reduced over several nights, produced only weak changes. According to the IRM, the next step is an international field study, to validate the method under realistic conditions. For a danger that today leaves no trace, it is a direction.

The proposals

Prof. Mauro Manconi, deputy chief physician of the EOC Sleep Medicine Service and Drive Awake's scientific partner, points to two concrete directions. Clinical prevention: consider proportionate screening for sleep disorders as part of fitness-to-drive assessment, for prevention and not sanction, with particular attention to professional drivers and to cases following a crash consistent with a microsleep. Specialist assessment: where a sleep disorder is suspected, connect traffic medicine with sleep-medicine specialists and with the network of centres certified by the Swiss Society for Sleep Research, Sleep Medicine and Chronobiology (SSSSC). Not mandatory screening for every licence, but targeted collaboration where the risk is most concrete.

For clarity

Criminal proceedings: acquittal, which became final after the Public Prosecutor’s Office declined to appeal. That outcome does not imply a broader civil or factual conclusion about the event. The release gives no nationality, age or details of those involved: out of respect, and because the point is not the court case but the danger it makes visible.