Chapter 5: Signs, Signals, and Road Markings

Traffic signs, signals, and pavement markings form a universal language that directs drivers and ensures a safe, orderly flow of traffic. Understanding this language is non-negotiable for any driver, as it provides critical information about laws, hazards, and directions. A deep knowledge of these controls is a primary focus of the written driver’s exam and is essential for preventing collisions in daily driving.

Every traffic control device has a specific meaning conveyed through its shape, color, and placement. These devices are legally enforceable, and disobeying them is a moving violation that can result in fines, license points, and serious accidents. They are categorized to tell drivers what they must do (regulatory), what they should watch out for (warning), and where they are going (guide).

Sign Colors and Shapes

The shape and color of a sign provide the first and most important clue to its meaning, often allowing a driver to understand the message even before they can read the text.

Sign Shapes

• Octagon (8 sides) — Exclusively used for STOP signs. A driver must come to a complete stop before the stop line, crosswalk, or intersection.
• Triangle (point down) — Exclusively used for YIELD signs. A driver must slow down and be prepared to stop, yielding the right-of-way to traffic and pedestrians.
• Circle — Exclusively used for Railroad Advance Warning signs. It indicates a railroad crossing is ahead.
• Pentagon (5 sides) — Used for School Zone and School Crossing signs. It indicates that children may be present.
• Rectangle (vertical) — Generally used for regulatory signs, such as Speed Limit signs.
• Rectangle (horizontal) — Generally used for guide signs, providing directions or information.
• Diamond — Used for warning signs. These signs alert drivers to potential hazards ahead, such as a curve, slippery road, or merging traffic.
• Pennant (sideways triangle) — Used to mark the beginning of a No Passing Zone.