Marked County Road Concurrent with US Highway

[TheCatalyst31]

This one was in town; a lot going on here...

This is one of many examples of WISDOT being exceptionally, well, WISDOT. A US highway, county road, Interstate alternate route, and state route detour signed on the same road.

I found another example without really trying. I was trying to find an Interstate-county highway concurrency in that area that I thought existed but apparently doesn't, and got that instead. I almost wonder if OP mentioned the pentagon as a subtle way of not counting WisDOT's two zillion examples of this.

[Dirt Roads]

US 119 and Monongalia CR 857 are briefly multiplexed outside Morgantown, West Virginia. CR 857 is one of the few county routes that WVDOH signs with standalone markers as opposed to just putting shields on road name signs. Photo: https://maps.app.goo.gl/T4t3dLGB5ym8oF3H9

This is certainly an oddity that belongs here, but Secondary 857 is considered an LSR route rather than a county route.  There are at least 6 different LSRs in the WVDOH route lists.  I've always called them "long" secondary routes, but most of them are not long nor do they all cross county lines (like this LSR-857).  Most of them are downgraded State Routes.  LSR-857 is an oddity in the LSR numbering because it isn't numbered from its predecessor (WV-73), but rather from the connection to PA-857 turning up along Fairchance Road.

[Dirt Roads]

West Virginia has another oddity with LSR routes, with this overhead on the Seventh Avenue portion of the "Iowa Street Crazy Loop" in the far West End of Charleston.   LSR-21 is the former US-21, but the route is not shown in the WVDOH's Control Destination Logs.  When first constructed, this location was the official intersection of US-21/US-35/US-60 (even though US-21 and US-35 never actually intersected, with both ending a block away from this location).

[wanderer2575]

Levering, MI: