Final answer:
The period beginning one-half hour before sunrise and ending one-half hour after sunset is defined as daytime according to the Transportation Code.
Step-by-step explanation:
According to the Transportation Code, the period beginning one-half hour before sunrise and ending one-half hour after sunset is defined as daytime. This is the time when natural light from the sun is sufficiently bright to see and shadows are cast due to the sun's position above the horizon. The remaining times are generally considered twilight or nighttime, depending on the sun's position relative to the horizon, especially as we consider the astronomical twilight, which is defined as beginning when the Sun is 18° below the horizon, and ending once it is more than 18° below the horizon. This distinction is important as it relates to various regulations and driving laws to ensure safety during different light conditions.
The Incomplete Question:
According to the Transportation Code, the period beginning one-half hour before sunrise and ending one-half hour after sunset is _____:
a. daytime
b. nighttime
c. dusk
d. twilight