Federal Manual On Traffic Control Devices Site

The manual strictly divides its provisions into four categories to help engineers determine what is flexible and what is mandatory:

Substantial conformance with the MUTCD is required by law; failing to comply can expose government agencies and contractors to severe liability and litigation. 🛠️ The Four Text Classifications

The primary objective of the manual is to promote safety and efficiency on the nation's highways and streets. Federal Manual On Traffic Control Devices

A statement of practice that is a permissive condition. These statements use the word "may" .

A recommended but not strictly mandatory practice. These statements use the word "should" . The manual strictly divides its provisions into four

Reduces the frequency and severity of crashes by providing clear, predictable guidance.

Informational statements that provide background, data, or context without containing any mandates, recommendations, or permissions. 📖 Major Categories of Traffic Control Devices These statements use the word "may"

Standardizes the shape, color, size, and fonts of signs and markings so road users instantly recognize and understand them in any state.