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A long day becomes risky when
- Driving is paired with a major hike, flight arrival or late-night accommodation check-in.
- The road is narrow, winding, exposed or unfamiliar.
- Navigation and viewpoint decisions continuously compete for attention.

Driving guide
There is no useful universal scenic-road mileage cap. A four-hour motorway transfer and four hours on a single-track, alpine or stop-heavy scenic road are different tasks. Plan the driving day from road complexity, daylight, planned activity, unfamiliarity and the driver's recovery state, then remove stops before extending into fatigue.
Go to the guideAnswer first
There is no useful universal scenic-road mileage cap. A four-hour motorway transfer and four hours on a single-track, alpine or stop-heavy scenic road are different tasks. Plan the driving day from road complexity, daylight, planned activity, unfamiliarity and the driver's recovery state, then remove stops before extending into fatigue.
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If a schedule only works when every stop is on time and the driver never needs a break, the schedule is already too tight.
Official references
Sources were reviewed on 2026-09-03. Current road, rental and access rules can change sooner.