Train crews are essential teams responsible for the safe and efficient operation of trains. They typically consist of a conductor, who oversees the entire train operation, and engineers, who drive the train. Additional crew members may include brakemen or train attendants, who assist with passenger services and ensure safety protocols are followed. The primary duties of train crews include monitoring the train's speed, communicating with dispatchers, and ensuring that all safety regulations are adhered to. They also handle emergencies and provide assistance to passengers, making their role crucial for a smooth travel experience on railroads.