What is the maximum working horsepower allowed for empty unit trains on line?

The maximum working horsepower allowed for empty unit trains on line is set at 9000 horsepower. This limit is established to ensure safe and efficient operation of empty unit trains, recognizing that empty trains require less power for movement compared to loaded trains. The regulation of horsepower helps maintain optimal performance and control during transit, especially on varying terrain and weather conditions.

Exceeding this horsepower could lead to challenges in managing the train's speed and braking, making it crucial to adhere to established guidelines to prevent accidents or operational issues. The standard set at 9000 horsepower reflects industry guidelines designed to balance performance with safety.