# data[].attributes.body
The first electric stoplight is invented in Ohio.

# data[].attributes.body
Black and white stop signs originate in Michigan.

# data[].attributes.body
Stop signs are yellow with black letters. MUTCD ideally wanted it to be red to assign the meaning "STOP" with the color red since red meant stop on stoplights (see 1914), but they hadn't developed red paint that did not fade at the time.

# data[].attributes.body
The first edition of MUTCD was approved as American standard.

# data[].attributes.body
More fade resistant red paint is developed, and stop signs are changed to being red with white writing (in coordination with red meaning "stop" on stop lights).

# data[].attributes.body
This version of stop sign is adopted by the Vienna Convention on Road Signs and Signals and by the United Nations Economic Commission for Europe. Although today, sometimes in Europe, there are variations allowed.

# data[].attributes.body
The height of stop signs is determined: 7 feet tall in urban areas, 5 feet tall in rural areas.