Health, road and environmental safety, service and logistics
This domain covers the human and environmental side of professional driving: fitness to drive, fatigue management, health in the cab, customer service, and cutting emissions and disturbance without breaking delivery commitments.
Fatigue and fitness
Sleep need is 7–9 hours; sleep debt accumulates and cannot be paid off with coffee. The circadian low between 02:00 and 06:00, and again mid-afternoon, is when microsleeps strike. Norway's blood-alcohol limit is 0.02%, effectively zero for a professional. Medicines and residual alcohol the morning after are common causes of lost licences.
Health behind the wheel
Set the seat so the wheel is close and the arms slightly bent, move every couple of hours, drink water and avoid heavy meals before night driving. Whole-body vibration contributes to back pain. Report medical conditions and take the periodic medical examination seriously.
Environment and service
Plan routes to avoid empty running and low-emission zones, and switch off when stationary for more than a minute or two. Report damage, keep the temperature chain intact and communicate delays early - customers value information more than excuses.
Worked example
A driver finishes at 22:00 and is rostered to leave at 03:00 after about five hours' sleep. Legally, that rest may be sufficient, but the drive coincides with the circadian low and accumulated sleep debt. Reasoning: safety regulation sets a floor, not a guarantee of fitness. The driver should report unfit and the planner should move the start or add a second driver. Accepting the trip is the exam's wrong answer because legal is not the same as fit.
Traps
- Equating legal rest with adequate sleep.
- Believing coffee, fresh air or loud music cures fatigue - they mask it briefly.
- Ignoring early signs: yawning, lane drift, missed exits.