Why is it improper for conductors to close train doors without observing passengers?

The reason it is improper for conductors to close train doors without observing passengers is primarily due to safety concerns. Closing the doors without ensuring that all passengers are safely on board poses a significant risk of injury. A closing door could strike a passenger who is still boarding or alighting from the train, leading to serious accidents that can harm individuals and potentially lead to legal implications for the train operator.

Safety protocols are designed to protect both passengers and crew, and maintaining situational awareness when operating train doors is essential to prevent accidents and ensure a safe travel experience. By prioritizing passenger safety, conductors help to minimize risks and ensure that boarding and alighting are conducted smoothly and without injury.