Question.... Why are stop signs red? Why can't they be green, or purple or gold?
The Answer is....Stop signs started being used in Michigan in 1915. Originally white signs with black lettering, they became hard to see in inclement weather. After the AASHO and the NCSHS developed the MUTCD, the stop sign went through many different colors, sizes, designs, and mounting height. In 1954, the stop sign became the now-familiar red background with the white lettering and border. In 1968, the Vienna Convention for Road Signs and Signals adopted the American design of the stop sign to use throughout Europe. Today, most all countries use the octagonal shaped, red-background with white-lettering design.
Who invented lace and why?