OK.  That brake wheel (and for all of the other cars facing you in the photograph) raises a question I have been thinking about for the last month or so.  It's not like all trains go in the same direction.  So let's say these cars are all headed west.  A freight consist that has been traveling east enters the yard.  Short of running them out on a wye, how does one turn around an incoming car to add to the westbound cars?