Re: Ratios
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Jason
I think at least SOME of Tim Gilbert's data was not from train lists, but from "cars on hand" data - some railroads published this kind of data e.g. Great Northern annual reports. A railroad might have a good supply of home road cars "on hand" that were just waiting for assignments, or waiting for repairs. The PRR was famous for having tens of thousands of bad ordered cars on line just being held for repairs, or retirement. I've seen railroad yard photos that shows scads of home road cars of all kinds coupled together in long lines... A great type of data is to know percentages of (1a) originated loads that terminate online (1b) that terminate offline and (2a) received loads that terminate online or (2b) are interchanged to other roads. Knowing AAR rules etc, one can make intelligent guesses about model consists that represent these traffic flows. Tim On 9/15/2019 5:53 PM, Jason Kliewer wrote: I've transcribed 10,000 car movements from 1960's train list for the Chicago Great Western and the home road cars only made up 10% of the total. --
Tim O'Connor Sterling, Massachusetts |
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