WISDOT has an odd way of signing “TO” each highway which is evident in Green Bay. On I-43, there is a TO Wis 32 shield on the BGS with Wis 172 and I don’t think it’s needed since there’s many other exits that motorists are using besides the Wis 32/Ashland Ave. Yet on I-41, a TO Wis 32 shield is omitted from the Ashland Ave exit when it would be more appropriate to use since the exit is a direct connection with Wis 32. From Wis 32, the connection is signed as I-41 south.
Another place where TO signage would be useful is on I-41 south at Wis 60 where a TO Wis 164 sign would be useful since Wis 164 is close to I-41 and it’s a route that many motorists would use. On Wis 164 north, there is a To I-41 sign.
In other cases, WISDOT simply co-signs a highway with another to avoid using a “To” sign. Wis 91 is co-signed with Wis 44 to end at I-41 in Oshkosh and Wis 182 is co-signed with Wis 47 to US 51 instead of ending at the highways they run concurrent with.