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You beat me to the punch. This is exactly right. It was only on some Divisions that there were letter speed classes, namely the ones where there were trains pulled by both steam and diesels and where there were both light weight and heavy weight passenger cars. The employee TT's had very elaborate tables showing speed restrictions for various zones. Also some tables had speeds for trains with electro-pneumatic brakes. On Thursday, October 16, 2014 7:13 PM, "'Douglas Harding' doug.harding@iowacentralrr.org [CBQ]" <CBQ@yahoogroups.com> wrote: I consulted with a friend who collects train orders and he confirmed he had seen orders written with A, B, C, designations on other roads, but not on the Q. Made me wonder if the dispatcher was a transfer from another road who had not yet learned by the CBQ’s preferred terminology. But now Glen confirms this was proper terminology at the time the order was written. Another interesting little fact of history. Doug Harding __._,_.___ Posted by: "John D. Mitchell, Jr." <cbqrr47@yahoo.com> __,_._,___ |