How far apart must roadways be to form separate intersections?

Answer: B — At least 30 feet apart

The requirement for roadways to form separate intersections is determined by the distance that allows for distinct and manageable traffic flow. A distance of at least 30 feet between roadways is specified because this distance ensures that vehicles turning onto or crossing the road do not interfere with traffic from other intersecting roadways. It provides adequate space for any turning movements and minimizes the risk of collisions. This separation is crucial for maintaining traffic safety and efficiency, allowing for clear and recognizable intersections. If the roadways were too close together, it could lead to confusion among drivers and potential hazards, as vehicles may misinterpret side streets or encounter obstructed views of oncoming traffic. Thus, the 30-foot requirement serves multiple purposes in roadway design and traffic management.