Does speed affect the driver's field of vision?
A)It depends on the condition of the vehicle.
B)No.
C)Yes, the field of vision decreases as speed increases.Correct
As speed increases, the useful field of vision decreases, which is known as the "tunnel effect"; the driver is only able to perceive the centre of the road clearly, and lateral images pass so quickly that they are not perceived adequately. (This also occurs with alcohol consumption).