Why should a driver reduce the speed on their vehicle at night?

Reducing speed at night is crucial because the driver's vision is significantly less efficient in low-light conditions, which affects their ability to see and judge distances accurately. At night, visibility is diminished, and the contrast between light and dark can obscure important details on the roadway. This reduction in visibility means that objects, pedestrians, and other vehicles may not be as easily seen until they are much closer, making it necessary for drivers to slow down. By adapting their speed to the conditions, drivers allow themselves more time to react to unforeseen obstacles or changes in the road environment, ultimately enhancing safety for themselves and others on the road.

Other options relate to various factors, but they do not address the primary concern of visibility and distance judgment that impacts night driving specifically. For instance, while reducing engine overheating is important in hot conditions, it is not the primary reason for slowing down at night. Similarly, while allowing time for reflections from road signs can be a consideration, it doesn’t directly address the fundamental challenge of perception that night driving presents. Reducing noise for residents is also not directly related to safety; rather, it pertains more to community courtesy than driving efficacy. The primary issue at night is the reduction in visual capability, making option C the most relevant and critical