Please check out the flight in the link below:
It’s a flight from Salt Lake City (KSLC) going to Atlanta (KATL). Its filed route is as follows:
TCH J173 EKR GCK MEM ERLIN2
Looking at my charts (it takes two - sorry 'bout that), J173 begins at TCH and ends at EKR. There are no other navaids or intersections in between TCH and EKR. So J173 is essentially going from TCH direct to EKR.
So why bother with inserting “J173” in between “TCH” and “EKR” in the flight plan? Why not just file it as:
TCH EKR GCK MEM ERLIN2
Seems like a waste of the pilot’s time to file it that way, and all of the controllers who have to deal with that extra data.