Some more major things I found:
-There is a new UT-135, which goes along Pleasant Grove Blvd from 4850 West/2800 West east across I-15 to 700 North.
-There is also a UT-129, which begins at US 89 in Lindon, following 700 North and North County Blvd, ending at UT 92.
-UT-146 has been decommissioned (as part of a road swap in exchange for UT 129 being created).
-There is a new UT-131, which runs south from 14600 South along Porter Rockwell Rd as far as the road goes (they're planning to build a bridge across the Jordan and connect it with Porter Rockwell Blvd on the other side)
And then some nitpicky things, some of which may or may not need to change:
-UT-151 ends just after the I-15 junction, not at US 89. There is a pavement change and an END STATE MAINTENANCE sign at the END 151 sign just after the I-15 interchange.
-UT 268 extends west to the next street past I-15 (800 West), where the eastbound direction has a mile 0 marker and an East 268 sign.
-UT 186 actually ends at the Parleys Way interchange; the roads south of there are considered ramps.
-UT 106 extends west past I-15 to the street at the bottom of the bridge over the train tracks, where there is an End state maintenance sign westbound and an East 106 sign eastbound.
-UT 126 extends east on Layton Parkway past I-15 to Fort Lane.
-UT 103's east end is actually at I-15.
-UT 154 extends past I-15 to the next light (13800 South) -- this is well signed.
-UT 92 extends west to the next light (as noted below, this is signed).
And I'm sure there are a lot more.
