The westbound lanes of US 60 have been relocated just to the south of this marker; the road marked here now serves as a short local-access road immediately parallel to US 60. This is part of the US 60/MO 125 interchange project (and accompanying outer roads), which opened in August 2024:

https://www.modot.org/missouri-route-125-and-us-route-60-intersection-improvements-greene-and-webster