Which method of communication is least effective for informing the public about a collapsed bridge?

The method of communication that is least effective for informing the public about a collapsed bridge is through a magazine feature story. This approach has several limitations, particularly in the context of emergencies where immediate information is critical. Magazine articles typically require time to write, edit, and publish, making them unsuitable for urgent situations. Additionally, magazines are not a real-time medium; they may be read weeks or months after an incident occurs, which can delay public awareness of safety concerns.

In contrast, television broadcasts, social media updates, and radio announcements are immediate and can reach a broad audience quickly, providing essential information in real time about the collapse, safety measures, and potential detours. These methods are designed to convey timely updates and can be readily accessed by the public during emergencies, making them far more effective for urgent communication needs.