When driving a truck in foggy conditions, what guideline is advisable to follow inside the cab?

Question

DentroTest · Accepted Answer

Fog consists of tiny suspended water droplets that create very high relative humidity in the air. Because of the temperature contrast between the cold outside and the temperature inside the cab, the moisture condenses very quickly on the windshield and windows, fogging them up and drastically reducing visibility. For this reason, the DGT recommends keeping the cab well ventilated, making proper use of the air conditioning or ventilation system to continuously demist the glass. Lowering the windows completely does not improve real visibility: it lets humidity, cold and annoying noise into the cab. Setting the heating to maximum power without renewing the air is also a mistake, since excess heat promotes drowsiness in the driver and speeds up condensation on the glass.

When driving a truck in foggy conditions, what guideline is advisable to follow inside the cab?

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