Plan driving breaks for safety.
A long drive is planned as a sequence of driving blocks separated by breaks, and the arithmetic is simple once you see that the number of breaks is one fewer than the number of blocks — you do not stop after arriving. Two hours is the standard block, matching both professional practice and the point at which vigilance measurably declines. Alternating short breaks with a longer meal stop every third block keeps the schedule realistic: a 9 hour drive becomes 5 blocks, 4 stops, one of which is long, and 105 minutes of standing time. The number people underestimate is the elapsed total, which here is nearly 11 hours rather than 9 — this is why arrival estimates based on driving time alone are always optimistic.
Driving Break Planner
Blocks = driving minutes / block length, rounded up; stops = blocks - 1; long breaks = stops / long-break interval, rounded down; elapsed = driving hours + total break minutes / 60
Break planning reduces fatigue risk but does not eliminate it. Commercial drivers must comply with the hours-of-service or drivers' hours regulations that apply to them, which set mandatory minimum break lengths and daily limits.
Every two hours or 100 miles, for at least 15 minutes. Get out of the vehicle — a break spent sitting in the driver's seat does little for alertness.
Because navigation estimates give driving time, not elapsed time. Add your planned breaks — on a 9 hour drive that is typically an extra hour and a half.