Street signs dot every city block in the U.S. Without commanding much attention, they serve as a silent but ever-present reminder to live within the rules. Now, an organization is harnessing that ...

More Alaska State Troopers/Getty Images However other residents took the matter into their own hands, creating street signs such as "One World" and "No Justice No Peace." Mary Morris, who has ...

Photographer Alistair Hall spent four years — and took around 4,000 photos of street signs — across the city, documenting everything from types of font, to materials uses, to plaque shapes.