Black and White Road Signs. Like red signs, white signs with black lettering are regulatory, but rather than prohibiting something, they give directives.

Traffic signs have to communicate crucial information quickly and simply, to anyone who might be on the road. They use ...

He made it white, inspired by spilled milk he once saw on a freshly paved road, and that color remained the default for decades. By 1955, most states used white stripes to divide their traffic ...