National standards prescribe standardized signage throughout the United States to ensure the safety of the motorists.

Appropriate speed limits and appropriate warning signs should be provided to render the roadway safe by warning the motorist of changing conditions in the traveled way. The signs have to convey a coherent message with an appropriate and consistent syntax to the motorist.

The Professional Traffic Operations Engineers at Accident Diagnostics, Inc. are experts in federal, state, and local standards and are trained and experienced in signage design and analysis.