Which of the following measures may improve safety while driving a truck in fog?

The dense fog, visible in the picture, significantly reduces visibility, which shortens reaction time in the event of a sudden hazard, such as another vehicle braking. Maintaining a greater distance compensates for the reduced visibility, giving the driver more time and space to stop the vehicle safely. This is particularly important in the case of a heavy goods vehicle, which has a significantly longer braking distance due to its mass.