>>1314219>Their brakes function differently from passenger train's
Not really. They all have the ability to change the automatic valve to work under passenger service. The only difference is that the automatic works like the independent. i.e. you can gradually release and reapply them. >>1314217
The schedules aren't driven around point to point service. Manifest trains setout and pickup enroute adding hours and hours to trips that passengers would find unpalatable. The only realistic option would be to run it with point-to-point pig trains, but even a lot of them setout blocks and pick up. Passengers are also the worst type of freight. They whine and complain, shit, piss, and vomit. They need food, water, and airconditioning. Some of them even demand free wi-fi! On the other hand, a plastic hopper doesn't care if it sits in a siding for 2 hours waiting on a meet.