I don't think we've covered this topic before but I can think of several instances of this within California:
CA 3/A28 on 11th Street in Montague
https://flic.kr/p/2jVh2rM
J18 briefly on CA 165 at the bank of the Merced River
https://flic.kr/p/23UMBXF
There are some additional instances of Sign County Routes multiplexes on State Highways which don't have any field signage anymore such as J23 which has a definition following portions of CA 198 and CA 216. What other examples of Sign County Route/State Highway multiplexes in California are out there?
CA-120 is multiplexed with J14 from Oakdale to a little ways north of there.
Quote from: jrouse on November 01, 2020, 05:17:37 PM
CA-120 and CR-J14 from Oakdale to a little ways north of there.
iPhone
I forgot that I had a photo of that one. It's even briefly multiplexes with J9:
https://flic.kr/p/232AYdP
S80 and CA-86 in Imperial County
Near Branson: MO 165/MO 265/ Taney County 165
(https://live.staticflickr.com/65535/50170237788_d5e97b4e9c_d.jpg)