OK20 has been realigned in Claremore to a new bypass which just opened at the end of April
Just west of Claremore it will now follow a new path that will no longer multiplex with SH-88 (Will Rogers Blvd). It will now meet SH-66 south of Claremore at Flint Road here after going over it and the BNSF tracks.
https://www.openstreetmap.org/query?lat=36.278470&lon=-95.640342#map=17/36.278470/-95.640342.
It will then multiplex SH-66 to the north into Claremore to its existing junction with where it meets its existing eastbound route from SH-66 (Patti Page Blvd).
Also, a new interchange with I-44 has opened just east of that new bridge over OK66.. so I-44 needs a new junction (exit 252) as well.. While it doesn't technically exit directly to OK20, at least not by a few thousand feet anyways.. It is signed as SH-20 (which so is exit 255 which does actually exit directly to it).. so I'll leave that to how you see fit.