A couple of observations, if I may. Concerning the EBT's inside frame engines, I suspect that Bill P. is correct when he suggests that it was just their "traditional" approach. The railroad had sufficient clearance for standard gauge freight cars, so an outside frame steam locomotive should not have presented a problem. Bill also mentioned guard rails to keep blind drivers where they belong. The PRR occasionally used guard rails on **both** sides of the running rail on sharp curves on industrial trackage so that drivers didn't fall off the rail inside or outside the gauge. In enginehouse territory, heavy timbers would sometimes serve the same purpose.