What is the distance flags need to be placed in front on a vision obscured road?

The correct answer is based on safety regulations that dictate the proper placement of flags to alert drivers of potential hazards, especially when visibility is limited due to obstructions. When a road is obscured, such as by a curve or a hill, placing flags at a distance of 100 feet in front serves to give drivers adequate warning to slow down or prepare for any potential dangers ahead. This distance provides enough time for drivers to react appropriately, which is critical in maintaining safety on the road. Proper flag placement at this distance helps ensure that vehicles have enough visibility to respond to changing conditions, thereby enhancing overall road safety.