Motorists are inundated with roadside signs while driving. These can include speed limit signs, construction warnings, directions to prominent landmarks, and safety warnings (e.g., “Icy Road ...

The answer to why the signs were disallowed might be in the 31-paragraph ruling about “Uses of, and Nonstandard Syntax on Changeable Message Signs ” issued on Jan. 4, 2021 by the U.S. DOT and ...