I've always wondered why the Sunset is routed along the border instead of through Las Cruses? UP runs it's Freights that way, perhaps they could be flip-flopped and the Sunset would benefit by running through a Growing College town instead of the Ghost towns it serves in the desert!???
It's the geographical location. It has really steep mountains starting just north of El Paso, all the way north, somewhere south of Santa Fe. It's the Great Rift Valley where Rio Grande flows. So building track through Las Cruces is nearly impossible.