highway signs is a ubiquitous part of America’s infrastructure iconography. U.S. highway shields are probably the most famous mass-produced aluminum in the country. but, countless green signs From daily commutes to holiday road trips, every boulevard dot is a subtle staple of millions of journeys.These provide all the information you need To navigate the system, such as upcoming exits and distance traveled to further destinations. Also, the design of these signs has remained largely the same since the creation of the Interstate system. So why was green chosen as the official color?
according to Arizona Department of Transportation, is used because green is a “cool” color. The sign’s green background tends to blend in with the greens, blues, and browns of the natural landscape, providing a nice contrasting surface for the white text. ADOT spokesperson John Lavarbera said: “It blends in so well that it’s considered part of the landscape, but it stands out so much when you need it.” This explanation by ADOT covers the intuitive reasoning behind the choice of colors.
The green standard for guide signs is Unified transportation equipment manual (MUTCD). The first edition of the MUTCD was published in 1935 by the American Association of Highway Officials (now AASHTO). This association is a standards body made up of representatives from all state transportation departments. Early manuals focused primarily on national road markings, black-on-yellow warning signs, and black-on-white regulatory signs. Long-distance road travel was not as common as it is today, so there were no guide sign standards. Travelers were expected to use their own map with his markers for the route.
Guide signs have been formally standardized. 1954 white background sign on green, Two years before the Interstate Act was enacted. This important correction was included in the 1948 edition of the MUTCD in a 15-page supplement. The supplement also requires stop signs to be white on red. Before this change, stop signs could have black or red text on a yellow background, just like other warning signs.
Information signs were officially standardized as white-on-green signs in 1954, two years before the Interstate Act was passed. This important correction was included in the 1948 edition of the MUTCD in a 15-page supplement. The supplement also requires stop signs to be white on red. Before this change, stop signs could have black or red text on a yellow background, just like other warning signs. AASHO he avoided the red billboard in the 1930s. Because a fade-resistant red paint finish didn’t exist yet.
The current 2009 edition of the Manual on Uniform Traffic Devices lists the standard for guide sign color in Section 2D.03.02:
“Except where otherwise provided in this Manual for individual signs or groups of signs, guide signs on streets and highways shall have a white message and border on a green background. All messages, borders, and legends shall be retroreflective and all backgrounds shall be retroreflective or illuminated.”
Without this standard, the United States could have ended up with a kaleidoscope of sign colors. Arizona once even experimented with color-coded signs based on direction. Blue for westbound signs, brown for eastbound signs, orange for northbound signs and green for southbound signs.