https://en.wikipedia.org/wiki/Railroad_police
If they arent going to pay for bulls, the railroads can pay the extra insurance premiums. Private railroad police (bulls) were once common. We can bring them back. Public, sworn, railroad police are common in some cities and could also be expanded to police cargo trains.
>> Through his detective business, Allan Pinkerton met George B. McClellan, the president of the Ohio and Mississippi Railroad and Illinois Central Railroad, as well as its attorney, Abraham Lincoln. With Lincoln's encouragement, Pinkerton began supplying detectives for the railroad.