Sign colors, shapes and regulatory signs

Key points

1. Even if a stop sign is damaged or covered, its octagon shape and red color tell you to stop.

   Source: Handbook p. 35

   “Even if a stop sign is damaged or blocked by dirt, limbs or snow, you should know by the octagonal shape and red color that you must stop.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 35

2. The STOP sign is the only 8 sided sign and is always red with white lettering.

   Source: Handbook p. 36

   “This sign is the only eight-sided sign on the roadway. It always means that there is danger. It will always be red with white lettering.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 36

3. Red is a background only for STOP, ALL WAY plates, DO NOT ENTER, WRONG WAY and interstate route markers.

   Source: Handbook p. 35

   “RED is used only as a background color for STOP signs, multiple supplemental plates (FOUR-WAY or ALL WAY), DO-NOT-ENTER messages, WRONG WAY signs and on Interstate route markers.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 35

4. A regulatory sign is always a rectangle that tells you about laws, such as speed limits or lane use.

   Source: Handbook p. 35

   “a regulatory sign is always a rectangle, telling you about laws and regulations or giving you instructions such as speed limits or lane uses.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 35

5. Yellow is the background for warning signs and school signs, except where orange is used.

   Source: Handbook p. 35

   “YELLOW is used as a background color for warning signs, except where orange is specified, and for school signs.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 35

6. Orange is used only for construction and maintenance signs.

   Source: Handbook p. 35

   “ORANGE is used as a background color for construction and maintenance signs and shall not be used for any other purpose.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 35

7. Fluorescent yellow green marks school zones and other pedestrian areas such as crosswalks.

   Source: Handbook p. 36

   “FLUORESCENT YELLOW-GREEN is now in use for signage in school zones and other pedestrian traffic areas such as crosswalks.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 36

8. Blue signs point to motorist services, including police, rest areas and the emergency route marker.

   Source: Handbook p. 35

   “BLUE is used as a background color for information signs related to motorist services (including police services and rest areas) and the Emergency Route Marker.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 35

9. The 3 sided YIELD sign means you must stop and wait when vehicles approach from the right or left.

   Source: Handbook p. 36

   “This three-sided sign means that you are approaching an intersection and must stop and wait when other vehicles are approaching from the right or left on the other roadway.”
   Tennessee Comprehensive Driver License Manual, Handbook p. 36

10. A white sign with a red circle and diagonal line means NO to whatever is shown behind the red symbol.

    Source: Handbook p. 37

    “Signs having a white background and a red circle and a line diagonally through them mean “NO” according to what is shown behind the red symbol.”
    Tennessee Comprehensive Driver License Manual, Handbook p. 37

Numbers to know

Recognize these signs

3 questions from the Tennessee practice test

1. 1. Which Tennessee signs use red as their background color?

   1. All regulatory signs
   2. Guide signs to parks and services
   3. Warning signs for curves
   4. STOP, DO NOT ENTER and WRONG WAY signs and Interstate route markers
   Show answer

   STOP, DO NOT ENTER and WRONG WAY signs and Interstate route markers. Red backgrounds are reserved for a short list of high consequence messages: STOP, the FOUR WAY and ALL WAY plates under it, DO NOT ENTER, WRONG WAY, and the shield shape on Interstate route markers. Most regulatory signs use a white background with black or red legend, curve warnings are yellow, and park and service guide signs are brown or blue. When a red field appears in your headlights at night, the manual wants an immediate reaction, because it usually means you are about to enter a road the wrong way.

2. 2. What background color does Tennessee use for warning signs and school signs?

   1. White
   2. Green
   3. Blue
   4. Yellow, except where orange is specified
   Show answer

   Yellow, except where orange is specified. Yellow is the warning color. Curve, intersection, pedestrian and animal crossing signs sit on a yellow field, and school signs use yellow or its fluorescent yellow green variant. Orange replaces yellow only in construction and maintenance zones. White backgrounds belong to regulatory signs, green to guide signs with directions and distances, and blue to motorist services. Reading color first lets you sort a sign into warn, command or inform from far away.

3. 3. What kind of information is generally conveyed by a rectangular regulatory sign?

   1. A warning that a railroad crossing is immediately ahead
   2. A recommendation for a scenic recreation area
   3. Laws, regulations, or instructions such as speed and lane use
   4. A notice that a road surface is slippery
   Show answer

   Laws, regulations, or instructions such as speed and lane use. A rectangular regulatory sign communicates a rule or instruction that governs road use. Examples include speed limits and lane-use directions. It is not the standard warning shape for a railroad, slippery pavement, or other hazard, and it is not primarily a recreation guide. Drivers should read the wording, symbol, or lane arrow and follow the displayed requirement. The shape helps identify the sign category, but the actual message supplies the specific rule. Treating a regulatory sign as optional can create a violation or conflict.

Source: the Tennessee Comprehensive Driver License Manual, Section B-3: Traffic Signs and Signals. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.