Chapter 5: Signs, Signals, and Road Markings

Traffic signs, signals, and pavement markings form the language of the road, providing essential information, warnings, and commands to drivers. Understanding this universal system is crucial for navigating safely and legally, as it ensures all road users are operating under the same set of rules and expectations. Correctly interpreting these devices allows you to anticipate road conditions, understand right-of-way, and avoid serious collisions, making this knowledge a cornerstone of safe driving and a key area of focus on the knowledge test.

The system of traffic control devices in Washington uses specific colors, shapes, symbols, and words to regulate, warn, and guide drivers. Regulatory signs state the law, warning signs indicate potential hazards, and guide signs provide directional information. Traffic signals and pavement markings work in conjunction with signs to manage the flow of traffic and ensure safety at intersections and along roadways.

Sign Colors and Shapes

The color and shape of a traffic sign provide instant information about its meaning, often before you are close enough to read its text. Recognizing these visual cues is a critical driving skill.

Sign Shapes

• Octagon (8 sides) — Exclusively for Stop signs.
• Triangle (downward-pointing) — Exclusively for Yield signs.
• Circle — Exclusively for Railroad Advance Warning signs.
• Pennant (sideways triangle) — Exclusively for No Passing Zone signs, found on the left side of the road.
• Diamond — Used for warning signs, indicating potential hazards or changes in road conditions ahead.
• Rectangle (vertical) — Generally used for regulatory signs, such as Speed Limit signs.
• Rectangle (horizontal) — Generally used for guide signs, providing directions or information.
• Pentagon (5 sides) — Used for School Crossing and School Zone signs.
• Crossbuck (X-shape) — Indicates a railroad crossing is directly ahead.