What defines a blind intersection?

Answer: B — An intersection obstructed by buildings or foliage

A blind intersection is characterized by being obstructed by buildings, trees, or other foliage that limits visibility for drivers approaching the intersection. This lack of visibility can create hazardous conditions, as drivers may not see oncoming traffic or pedestrians until they are very close to the intersection. Understanding this definition is crucial for safe driving, as drivers need to be extra cautious when navigating these types of intersections. The other choices do not capture the essence of a blind intersection. For instance, an intersection without traffic signals does not inherently pose visibility issues; it may still have clear sightlines. Similarly, an intersection that has limited signage does not necessarily equate to being a blind intersection if visibility is adequate. Lastly, heavy traffic may lead to congestion but does not directly impact visibility at the intersection itself. Thus, the defining feature of a blind intersection is the obstruction that affects a driver's line of sight.