The Rest of the Departments Practice Test

Understanding sign shapes helps you read traffic cues quickly. In Wisconsin, state highway signs are square or rectangular because the rectangular form is used for route identifiers and other regulatory/guide information. This shape keeps state route signs consistent with other important roadway information that drivers need to see at a glance, separate from warning signs (which are diamond-shaped), yield signs (triangular), or circular signs used for specific regulations. So the state highway markers you encounter on Wisconsin roads are the rectangular type.