Coal trains, loaded and empty, which bypass our yard for points east (or returning west) travel at track speed on the main line (40 m.p.h.) around the yard. Once the engines clear the control point at Elmhurst (Park) they’re allowed to bring the speed up to whatever the special instructions say about the equipment (probably 50).
The trains destined for points north on our line basically have to enter the yard, which means 10 m.p.h.