What impact does fading light have on a driver’s field of vision at night?

Fading light significantly affects a driver's ability to see, which is critical for driving safely at night. As light diminishes, especially during twilight or nighttime, a person's vision undergoes several changes, one of which is the narrowing of the field of vision. This occurs because the human eye relies on sufficient light levels to function optimally. In lower light conditions, the eyes are less able to gather and process visual information from the surrounding environment, particularly from the sides.

As a result, depth perception can become impaired, and the ability to detect objects or movement in peripheral vision is reduced. The narrowing of the field of vision indicates that at night, drivers may have a more limited view of their environment, making it harder to see potential hazards or other road users. This understanding sheds light on why it's essential for drivers, especially those in emergency response, to take extra precautions while driving in low-light conditions.

The other choices do not accurately reflect the impact of fading light on night driving, as as color perception does not enhance in low light, peripheral vision is generally compromised rather than increased, and speed perception can indeed be affected by reduced lighting conditions.