Sign Colors and Shapes

Key points

1. Signs have three purposes: they regulate, warn and inform, and their shapes and colors help you understand the message quickly.

   Source: Handbook p. 28

   “Signs have three purposes: they regulate, warn, and inform. The shapes and colors of highway signs have special meanings. This helps you understand the message quickly.”
   Nevada Driver's Handbook, Handbook p. 28

2. Red means no, do not or stop; green means direction; yellow means warning; white means a rule.

   Source: Handbook p. 28

   “Red no, do not, or stop Green direction or guidance Yellow or yellow green general warning White regulatory, law, or rule”
   Nevada Driver's Handbook, Handbook p. 28

3. Orange marks road construction or repair; blue marks driver services; brown marks recreation.

   Source: Handbook p. 28

   “Orange road construction or repair warning Blue driver services, such as food and lodging Brown recreation and scenic area information”
   Nevada Driver's Handbook, Handbook p. 28

4. An octagon (8 sides) means stop; an inverted triangle means yield.

   Source: Handbook p. 28

   “Octagon (8 sides) STOP Diamond warning Rectangle traffic regulations or directions to drivers Inverted triangle yield right-of-way”
   Nevada Driver's Handbook, Handbook p. 28

5. A pennant means no passing, and a pentagon (5 sides) marks school zones and crossings.

   Source: Handbook p. 28

   “Pennant no passing Pentagon (5 sides) school zones and school crossings”
   Nevada Driver's Handbook, Handbook p. 28

6. A circle means a railroad crossing ahead, and a crossbuck marks the actual crossing.

   Source: Handbook p. 28

   “Circle railroad crossing ahead Crossbuck (X) actual railroad crossing”
   Nevada Driver's Handbook, Handbook p. 28

Numbers to know

Recognize these signs

3 questions from the Nevada practice test

1. 1. Which roadway sign shape is reserved for a STOP instruction?

   1. Inverted triangle
   2. Octagon with eight sides
   3. Circle
   4. Pentagon with five sides
   Show answer

   Octagon with eight sides. Nevada lists the octagon, an eight-sided shape, as the standard shape for STOP. The handbook says sign shapes and colors have special meanings that help a driver understand the message quickly, so the outline alone tells you a full stop is required. An inverted triangle identifies yield, a circle warns of a railroad crossing ahead, and a five-sided pentagon identifies school zones or school crossings. Connect the eight-sided outline with a required full stop, then obey the sign and the pavement markings at that location.

2. 2. What does a five-sided pentagon-shaped highway sign identify?

   1. A school zone or school crossing
   2. A railroad crossing ahead
   3. A no-passing zone
   4. A route marker
   Show answer

   A school zone or school crossing. The five-sided pentagon is the shape used for school zones and school crossings. It should prompt a slower, more attentive approach and a search for children, crossing guards, marked crossings, and active school controls. The circle belongs to railroad crossing warnings, the pennant marks no passing, and a shield identifies routes. Do not rely only on the shape; read any speed sign and obey a crossing guard or signal controlling the location.

3. 3. What can a sign shape tell a Nevada driver?

   1. Which emergency worker is nearest
   2. The exact number of vehicles allowed in a lane
   3. Whether the pavement was recently repaired
   4. Whether the sign gives a warning, regulation, or other roadway message
   Show answer

   Whether the sign gives a warning, regulation, or other roadway message. Nevada assigns meanings to standard sign shapes. A diamond indicates a warning, an octagon marks STOP, and an inverted triangle identifies yield right of way. Shape recognition gives the driver useful information before the wording is fully read. The other choices confuse sign design with traffic volume, pavement history, or emergency response. Notice the outline first, confirm the color and symbol, and then follow the message at a speed that leaves time to react.

Source: the Nevada Driver's Handbook, Chapter 3: Signs, Signals and Markings. 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.