Now, your explanation was necessary for me. Thing is, the “M” of McDonalds is so familiar to me at this point that I apparently no longer see it as an M. Interesting. Thanks!
The dog one is my favorite so far.
There are a number of those hitchhiker signs near prisons–one on I-69 in Michigan between Port Huron and Flint springs to mind.
My ex and I had a few occasions to drive by this particular sign along I-80 in northern Nevada. We always assumed a spelling-challenged Lord Vader was lurking about in the vicinity.
There’s a church I drive by sometimes that has a sign that says
Maybe it’s just me, but I find it hilarious.
On the highway in Ontario leading east out of Detroit, there was a street sign that said:
“Sexton Side Ave.”
Someone came along and blotted out the “t”.
This sign is on the outside of the African painted dog enclosure at The Wilds in Ohio.
I find those tow signs particularly wonderful. I wonder why they two towns agreed to do that.
I know that sign. Apparently they’re not supposed to sell you a live chicken but under certain circumstances they will.
On the way home tonight at the side of the highway:
produce
eggs
A sign on the 401 near Napanee proudly announces that if you’ll just leave the freeway, you can soon be at Hell Holes Nature Trails.
I don’t want to go, because I’ve heard the place is a… well, what it’s called.
There used to be one in Starke, FL on 301 that read “Caution: Hitchhikers may be escaped prisioners” I never felt good about the security of that prison.
Several years ago I was watching a Cubs game against the Kansas City Royals. One of the Royals’ players was Chili Davis. A KC fan held up a homemade sign that said, “Chili, give us the runs.”
There’s one by my parents house that either says “BLIND CHILD, DRIVE CAREFULLY”. I remember when I was little asking my mom why they couldn’t just make all the families with blind kids live on one street so they could save money on signs.
About a 1/3 of the way from Milwaukee to Chicago there’s a sign that says “CHICAGO 69” (as in 69 miles to Chicago). I’ve always figured that one must get stolen from time to time. OTOH, if that was the case, I assume they’d just move it a mile in one direction or the other.
I was watching a Packers-49’ers game on TV when Jerry Rice played wide receiver for San Francisco. Some hometown Green Bay fans had hung a sign that read, **“Today’s menu - Rice, smothered in cheese.”
**
(Wisconsin being known as a major cheese-producing state and the Packers fans being known as “Cheeseheads.”)
In Memphis, TN, Union Ave. has an overpass that goes over some railroad tracks and other stuff. Off that overpass, there was an exit for Flicker St. (It may still be there, it’s been decades since I’ve driven over that bridge) that was identified by the street name. Originally, like all the other exit signs, the name was written in all Caps (FLICKER ST), but I guess too many people had the “L” and the “I” blur together to form a “U”, so it was changed to “Flicker St”.
excavating (for a mind)
Watching a ball game quite a few years ago, a fan held up a sign:
Hey Hrbek!
Buy a vowel!
Kent Hrbek
The Knoxville IceBears used to have a player, Mike Craigen, was rather short for a hocley player. He was one of the guys you want on your team - but hate if he’s on the other team.
One of our fans held up a sign to the glass: “You must be this tall to play this game”. He about fell out laughing.
Nice guy, off the ice. He’s now their coach.
But they grow up to be
SLOW
MEN
WORKING
so it’s not like they can’t earn a decent wage.
A series of three signs in vertical order that I saw years ago in Afton, MN:
Private Road
Antique Customers Only
Dead End
It musta been a mortuary. 
Actually, those are the east and west terminus of U.S. Highway 50. They (DOT?) tend to do it for other highways and interstates as well.
I’ve never seen it anywhere else. For example, the western terminus of Interstate 80 is in San Francisco, and there is no sign there telling how many miles it is to the other end.