I was driving on U.S. Route 222 today from Conowingo, Maryland up to Lancaster, Pennsylvania. In Quarryville, Pennsylvania, where U.S. 222 joins up with PA-372, I caught a PA-222 shield that should be a U.S. 222 shield. I've seen other examples of this in Pennsylvania in the highway guides, such as PA-1 and PA-13 shields north of Philadelphia that are supposed to be U.S. 1 and U.S. 13.
For those who don't know, there actually is a PA-222 that picks up where U.S. 222 leaves off in Allentown. Also, MD Route 222 starts in Conowingo at U.S. 222's southern terminus; that route used to be a continuation of U.S. 222 to Perryville.
By the way, if there's already a "mistake shield" thread here, would the moderators please move this post here. Thank you.
The picture is below.
https://imgur.com/a/jDFBR
Allentown has a few error US 222 shields(on Cedar Crest Blvd (https://www.google.com/maps/@40.5836678,-75.5227256,3a,75y,201.53h,95.45t/data=!3m6!1e1!3m4!1sH9yyv6nl5c2CJhvZwcfQmA!2e0!7i13312!8i6656) and I remember one on PA 145 SB (https://www.google.com/maps/@40.6045532,-75.472783,3a,75y,197.26h,79.88t/data=!3m6!1e1!3m4!1s7qXySzmbtpk65moO55ws9g!2e0!7i13312!8i6656) downtown), being from VA I just expect it.
And yes we have an Erroneous Road Sign thread (https://www.aaroads.com/forum/index.php?topic=87.3975) at 160 pages.