Final answer:
Out of the given options, the curb or edge of the public road can usually be considered a legal parking zone, provided there are no additional restrictions or signs prohibiting parking in that area. Therefore, the correct answer is option D. The curb or edge of the public road
Step-by-step explanation:
The question asks which of the following can be considered a legal parking zone.
Out of the options provided, D. The curb or edge of the public road is typically the correct answer, assuming there are no other restrictions such as fire hydrant access, disabled parking only designations, or specific signs indicating no parking. It's important to always observe any local laws or signs that may indicate parking restrictions.
Options A, B, and C describe areas where parking is generally prohibited for safety and accessibility reasons. For instance, parking on a crosswalk or sidewalk infringes on pedestrian safety, parking within 30 feet of a stop sign, yield sign, or traffic signal can obstruct visibility for other drivers and pedestrians, and parking on a bridge or overpass or in a tunnel or underpass can pose safety hazards and impede traffic flow.
Therefore, the correct answer is option D. The curb or edge of the public road