What percentage of railroad accidents occur at properly functioning automatic warning devices?

The correct answer is 15%, which is significant when considering safety measures in the railroad industry. This statistic highlights that a notable portion of railroad accidents takes place even when automatic warning devices, like lights and gates, are functioning as intended.

Understanding this percentage is crucial for various stakeholders, including regulatory bodies, transportation agencies, and the public. It emphasizes the importance of continuous improvement in safety measures and driver awareness at crossings. It also indicates that while technology aids in preventing accidents, human factors or other unexpected variables may still contribute to incidents, stressing the need for comprehensive safety training and awareness campaigns.

The other options indicate lower percentages, which would suggest a lesser degree of concern regarding the effectiveness of automatic warning devices. Yet, recognizing that 15% of accidents occur despite these devices signals the ongoing need for vigilance and adherence to safety protocols when approaching railway crossings.