More stuff I've been looking at...
It looks like both UT90 and UT93 should both be included. UT90 in Brigham City definitely; it has the requisite signage both
EB and
WB, as well as approach signage on US89 and UT13. As for UT93, it's a little less definitive, but I argue there's so much easy-to-follow signage from
the I-15 exit endpoint and
the US89 endpoint that inclusion seems justified.
Also, the northern endpoint for UT66 should probably be extended. UT66's current endpoint is at its intersection with I-84, but both signage
(1) (2) and
UDOT suggest that UT66 passes that junction with I-84, turns east down N 600 E St, and then turns and ends at a second junction with I-84. I realize both junctions are kinda part of the same exit (103), but cutting out nearly 3/4 of a mile seems like a lot.
v.