How should the driver’s back be positioned against the seat backrest to ensure safety and reduce fatigue?

Question

DentroTest · Accepted Answer

Correct seating position is crucial for both active and passive safety. The general rule is that the backrest should be as vertical as possible, but not 'completely vertical' (90 degrees), as this causes stiffness and fatigue. The back must be fully supported against the backrest, from the lumbar region to the shoulders. The correct answer indicates that the lumbar area is positioned with a slight incline or firmly settled into the seat's curve, allowing the upper back to rest naturally. This facilitates reach to the steering wheel and maximizes the effectiveness of the headrest and seatbelt. Reclining too far is dangerous as it reduces visibility and increases the risk of the 'submarining effect' during an impact.

How should the driver’s back be positioned against the seat backrest to ensure safety and reduce fatigue?

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