I-75, Dayton, OH, Exit 58- Needmore Road
Let’s not forget good ol’ Weed California!
http://0.media.collegehumor.cvcdn.com/2/1/collegehumor.ce798282469df75794ab7721c3d16790.jpg
Or the famous ZZYZX road
https://s3-media3.fl.yelpcdn.com/bphoto/1pKktLyrUlAETySb70VE2Q/348s.jpg
I see those signs and I tell my kids that dumb kids live in this neighborhood.
Some neighborhoods have signs to the effect that they love (usually with a heart) their children so please slow down. Oh yeah, like the rest of us are fine with you driving 90 through our neighborhoods because we don’t care about our kids.
You also see “Crime Watch Area” signs. I looking for the bleachers.
There’s a sign here in town that says, “Stay in Lane. Merge Later.” But there is no subsequent sign that says, “Okay You Can Merge Now.”
It’s since been corrected, but the sign directing motorists in MA to I-195 towards “Cod Cape.”
https://c.o0bg.com/rf/image_371w/Boston/2011-2020/2016/11/22/BostonGlobe.com/Metro/Images/cod-cape-sign-dartmouth-pd-fb-11642.jpg
This one is near me:
https://en.wikivoyage.org/wiki/Boring#/media/File:Boringorcity.jpg
I’m laughing out loud at some of these. Keep 'em coming!
In Wisconsin (and maybe other states, too), we have what my family calls “dancing deer” signs. http://www.roadtrafficsigns.com/Crossing-Sign/Deer-Symbol-Sign/SKU-X-W11-3.aspx
I do take these seriously, given that I’ve almost hit a deer and know other people who have. There are also “turtle crossing” signs in my city.
On the LIE, there are/were signs that read “In case of emergency, use right shoulder.” When my oldest son was first learning to read, he thought that meant that you should throw up to the right if you got car sick!
@MidwestDad3 - S17 goes to Fredonia, I have to warn him to watch out for those “hitchhikers.” I didn’t realize there was a prison there.
On Phillip Island in Australia, you can go see the little penguins come out of the water at the end of the day and head to their nesting areas. Signs in the parking lot remind you to check under your car for penguins before you leave.
Right before a winding stretch of road in Missouri, a sign says “drive with caution next 12 miles.” After that, you can throw caution to the wind, I guess.
This guy vacations at a lot of the same places we go.
https://www.amazon.com/Stick-Mans-Really-Bad-Day/dp/1452111545
@rosered55 we take those deer signs seriously, too. We’ve had 2 collisions with deer in our family so far. And those moose warnings as well although we’ve been lucky to avoid colliding with those. Can’t imagine given their heft.
For those visiting Allegheny College in Meadville, PA, just off I-79 PennDOT has a road sign sculpture garden. It’s not quite Storm King, but it is . . . well . . . interesting. A prime viewing spot is from the Dairy Queen across the street IIRC.
Somebody has added a large red dot on the nose of one of those dancing deer signs near my work.
As far as altered signs, it’s thing to get creative with signs on St. John in the USVI.
https://www.google.com/search?q=st.+john+usvi+traffic+signs&rlz=1C5CHFA_enUS745US745&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiwru6HzrfWAhWH5iYKHUq0Atg4ChD8BQgKKAE&biw=1378&bih=710#imgrc=_
Not a road sign, but in the medical facility I go to, there is a notice warning you about the speed “hump” ahead. My H thinks it’s code for a quickie.
D on the drive back to school for 2nd semester freshman year at a big football school: “No Tailgating. What a stupid sign! We’re nowhere near the stadium. Who would pull off here?”
We thought she was trying to be funny… but sadly, no. 
Sounds perfect for the truckers that missed the runaway ramp.
I am always amused by the sign for the library that has no words, just a picture of a person holding a book.
I’m always puzzled but the plethora of negatives in the “End of brake retarder prohibition” signs. I mean, seriously, I have to diagram that sentence to figure out what it means