I was in Dallas last weekend, so checked out the new (2020) westernmost segment of US 175. Big improvement for sure. I was surprised to find that parts of SM Wright Frwy (old US 175) are still open to traffic... and US 175 signage has not yet been removed. Heading south on I-45, there was a VMS stating "US 175 closed", and I mistakenly assumed that was in reference to the new US 175. But it was actually referring to SM Wright (where all southbound traffic was being forced to turn off at Pine St). Along that segment was another VMS, which referred to the route as "I-175". Seems like TXDOT should stop referring to the old route by its old number and instead refer to it as "SM Wright".
I looked around down there in the last few days, and was surprised by the signage at/along S.M. Wright. There is a new shield sign assembly at the signal where the WB off-ramp from WB US 175 meets S.M. Wright. It shows both SB and NB TX 310; I thought sure the TX 310 part of S.M. Wright would only be south of US 175. The S.M. Wright exit from SB I-45 has new BGSes listing S.M. Wright but no numbered routes. IMO it would be confusing to some drivers to have the new US 175 terminus/connection done at I-45, but yet still have old US 175 shields still up along parts of S.M. Wright that have not seen construction yet.
The S.M. Wright project otherwise is coming right along, with the old overpass embankments where 'Dead Man's Curve' was, as well as the one at Elsie Faye Heggins (ex-Hatcher St.), both have been removed, while work has started at the old Pine St. exit on its embankment. The overpass deck over Pine has been removed. Work has not started on Metropolitan, Pennsylvania, or Martin Luther King Blvd. Nothing has started on the removal of the exit/connection to Good Latimer yet, either.
I took a look at Lamar St. nearby, and work on it has largely finished, but nothing has been done about the signage yet. The Dallas city council voted that Lamar between I-30 by downtown, and S.M. Wright, should be renamed for Botham Jean, a young man sadly killed in his own apartment by a Dallas policewoman who somehow mistook Botham's apartment for her own. The apartment complex and the Dallas PD headquarters are both along the same stretch of Lamar that the city council voted to rename. The vote was a few weeks ago, but no street blades or BGSes have changed yet.