Chapter 5: Signs, Signals, and Road Markings

Traffic signs, signals, and pavement markings form the language of the road, providing essential information, warnings, and regulations to every driver. Understanding this system is non-negotiable for safety; it ensures traffic moves in an orderly, predictable fashion and helps prevent crashes at intersections and along roadways. Mastery of this visual language is a primary focus of the knowledge test and a core skill for safe, defensive driving.

Sign Colors and Shapes

The color and shape of a traffic sign provide the first and most important clues about its meaning. A driver can often recognize the message of a sign from a distance, even before reading its text, simply by identifying its shape and color.

Sign Shapes

• Octagon (8 sides) — Exclusively for STOP signs. A driver must come to a complete stop before the stop line, crosswalk, or intersection.
• Triangle (inverted) — Exclusively for YIELD signs. A driver must slow down and be prepared to stop, yielding the right-of-way to any vehicles or pedestrians in or approaching the intersection.
• Circle — Exclusively for Railroad Crossing advance warning signs. This round, yellow sign with a black “X” and “RR” indicates a railroad crossing is ahead.
• Pennant (sideways triangle) — Used for NO PASSING ZONE warning signs. This sign is posted on the left side of the road to supplement a solid yellow center line.
• Diamond — Used for warning signs. These signs alert drivers to potential hazards or changes in road conditions ahead, such as a curve, slippery road, or deer crossing.
• Pentagon (5 sides) — Used for School Zone and School Crossing signs. It indicates that children may be present and that a lower speed limit may be in effect.
• Rectangle (vertical) — Generally used for regulatory signs, such as Speed Limit, No Parking, or Keep Right signs.
• Rectangle (horizontal) — Generally used for guide signs, providing information about destinations, routes, and points of interest.