Street signs are tasked with a difficult job: to quickly and effectively provide important directional information to drivers traveling at high speeds. They must work at the extremes of the human perception of speed, and (ideally) be understandable by any person who may encounter them.
To do this, street signs must reduce design down to its most functional elements and play into knowledge of human perception. So what can be learned by looking at common wayfaring markers?People read shapes, not letters
While early street signs used all upper-case letters, nearly all modern street signs use a mixture of capital and lower-case letters (title case) that facilitates quick reading.
When graphic designers Jock Kinneir and Margaret Calvert famously redesigned and standardized the British road signs in the early 1960s, their decision to move away from all capitalized letters drew criticism. But... keep reading