Chapter 5: Signs, Signals, and Road Markings

Traffic signs, signals, and pavement markings form a silent language that guides drivers, regulates traffic flow, and warns of potential hazards. Understanding this language is non-negotiable for safe driving and is a primary focus of the driver’s knowledge test. Properly interpreting these devices allows a driver to anticipate road conditions, understand their legal obligations at any given moment, and navigate safely and efficiently.

Sign Colors and Shapes

The color and shape of a traffic sign provide the first and most important clues about its meaning. Each shape and color has a specific purpose, allowing drivers to recognize them from a distance, even before they can read the text.

Sign Shapes

• Octagon (8 sides): This shape is used exclusively for Stop signs. It means a driver must come to a full and complete stop before the stop line, crosswalk, or intersection.
• Triangle (inverted): This shape is used exclusively for Yield signs. It means a driver must slow down and be prepared to stop to let other traffic and pedestrians pass before proceeding.
• Circle: This shape is used for Railroad Advance Warning signs. It alerts drivers that a railroad crossing is ahead.
• Pennant (sideways triangle): This shape is posted on the left side of the road to indicate the beginning of a No Passing Zone.
• Diamond: This shape is used for Warning signs. It alerts drivers to potential hazards or changes in road conditions ahead, such as curves, intersections, or slippery surfaces.
• Rectangle (vertical): This shape is generally used for Regulatory signs, such as Speed Limit signs.
• Rectangle (horizontal): This shape is generally used for Guide signs, providing directions, distances, or information about services.
• Pentagon (5 sides): This shape is used for School Zone and School Crossing signs.