Where do you live? Most states I know of have laws that specifically prohibit parking within 15 feet of intersections or hydrants regardless of if the curb is marked. It's not only for visibility but also for larger emergency vehicles to navigate.
In California it’s 15’ from a fire hydrant/station, 3’ from a wheelchair curb cut, and don’t block a driveway/crosswalk/sidewalk. If they want no parking at a corner they mark it red.
I guess it's mostly an east coast thing, as most of those states prevent parking within a specified distance of an intersection (or stop signs/lights). Or perhaps the cities in CA set it independently from the state.
