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. Understanding this language is fundamental to safe driving, as it allows you to anticipate conditions, follow the law, and interact predictably with other road users. Mastering this topic is a primary goal for the written test and a non-negotiable skill for navigating Alaska’s roadways safely.

Every driver must be able to instantly recognize and obey the instructions given by traffic control devices. These devices are standardized by shape, color, and placement to convey specific meanings quickly and clearly.

Sign Colors and Shapes

The color and shape of a traffic sign provide the first and most important clue to its meaning. Drivers should be able to understand the general message of a sign from a distance, even before they can read its text.

Sign Shapes

• Octagon (8 sides) — This shape is used exclusively for Stop signs. It means you must come to a full and complete stop before the stop line, crosswalk, or intersection.
• Triangle (downward-pointing) — This shape is used exclusively for Yield signs. It means you must slow down and be prepared to stop, letting other traffic and pedestrians with the right-of-way proceed before you.
• Circle — This shape is used for Railroad Advance Warning signs. It is typically yellow with a black “X” and the letters “RR,” alerting you 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.
• Pentagon (5 sides) — This shape warns of a School Zone or school crossing ahead. Be prepared to slow down and watch for children.
• Diamond — This shape is used for Warning signs. It alerts drivers to potential hazards or changes in road conditions ahead, such as a sharp curve, slippery surface, or deer crossing.
• 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 information about routes, destinations, and mileage.