How is "daytime" defined according to traffic regulations?

The definition of "daytime" according to traffic regulations is established to ensure safety and proper visibility during driving conditions. The correct choice specifies that "daytime" is defined as the period starting 30 minutes before sunrise and extending until 30 minutes after sunset. This timeframe is significant because it captures the moments of dawn and dusk when natural light is transitioning, indicating the times when visibility may be lower and potentially hazardous road conditions can arise.

In contrast, the other definitions provide either a longer or shorter window that does not align with the regulation established for driving safety. For instance, defining daytime as an hour before sunrise or sunset extends the time unnecessarily into periods where lower light conditions might not be adequately addressed. Similarly, a definition that starts 15 minutes before sunrise or after sunset also does not reflect the typical legal interpretation of "daytime." Properly defining "daytime" is essential for setting expectations around driving behavior and ensuring that drivers are mindful of changing light conditions.