Step 3 » GENERAL learning environment Category B (B, B1)

For answer  A 

The visual field of the driver is reduced significantly as the travelling speed increases, a phenomenon known as “tunnel vision”. This physiological adaptation has the role of focusing the visual attention on the road ahead, thus reducing the peripheral perception to minimize the distraction from possible immediate dangers.

At high speeds, the brain prioritizes the processing of central information, neglecting the details from the periphery. For example, at 100 km/h, the visual field begins to narrow considerably, and at speeds of 300 km/h, it becomes extremely restricted, with the attention focused almost exclusively on the central area.

It is important to keep in mind that as the speed increases, the risks also increase, because the reaction time becomes critical within a narrower visual angle.

For answer  B 

The sizes of the windshield and of the rear window do not have a direct impact on the visual field, but they can only partially obstruct the visibility if they are dirty or covered. Also, these sizes remain unchanged while driving, having no connection with the way in which the visual field adapts to the travelling speed.

For answer  C 

The objects in the visual field or their sizes, such as road signs of small dimensions, do not influence the visual field itself. They can be more difficult to notice if the visual field is already reduced because of the speed, but their presence or size does not modify the visual field of the driver.

The correct answer is: A

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