Hints (highlight to view):
The first sign says NO OUTLET (not "I DO NOT HAVE A SNAIL DRAWN ON ME", but lol). One solver had seen this actual sign in real life!
The second sign identifies the name of the alley as WALDO. I got several creative guesses, including Candy Cane Lane, Barber St., and North Pole, and one student used landmarks to identify the street Waldo branches off of.
Hats off to those who solved one or both: Lucia, Josh M., Anna J., Zachary Z., Charlie, Peter V., Leo S., Maddy, Hazel, Jessica, Mr. Gregg and Mr. Gregg's wife, and one anonymous person!
And just for fun, here's another picture I took of a street sign, this time in Oakland. Props to my city for recycling: