Смертельный секрет четырех гудков: почему поезда всегда звучат одинаково

Have you ever wondered why train engineers across North America always blow exactly four whistles before each crossing? Behind this harsh acoustic combination lies nearly two centuries of history, intertwining nineteenth-century accidents, the romance of steam locomotives, and a deadly Florida experiment. In this video, we take a detailed look at how simple railway engineering evolved into an international safety standard, saving thousands of lives. Disclaimer: This material is for educational and entertainment purposes only and does not constitute professional advice. We recommend verifying the facts with official primary sources. Subscribe to the channel to stay up-to-date on new in-depth investigations into the world of engineering history!