Paul Tomblin wrote:

I was looking at Phoenix AZ on the low altitude en-route chart, and there
is a cluster of GPS waypoints charted all around the VOR (in the Class B).
I assume those are for GPS instrument approaches. Is there a reason why
those are charted on the en-route?

Those are waypoints on RNAV SIDs out of KPHX. The FAA and the airlines are
having a lot of problems getting those RNAV SIDs (aka: ATC DPs) to work
smoothly. It was thought by someone that including the fixes on the en route
chart would help.

But, who knows?