Alberta Motor Association (AMA) Learner’s Practice Exam

Lane control signs are designed to provide essential information regarding the use of lanes on a roadway. The correct classification is a black square with a white directional message. This design effectively conveys clear and unobstructed information to drivers, helping them understand which lanes they are permitted to use and when they should change lanes or stay in their current lane.

The black square signifies that the sign is regulatory and should be followed by drivers, while the white messaging ensures high visibility and clarity against the black background. This combination is specifically intended to communicate lane usage rules, such as which lanes are open or closed, or indicate directions for turning.

Other shapes and colors mentioned in the options serve different purposes. For instance, a red octagon with white lettering is universally recognized as a stop sign, indicating that drivers must come to a complete stop. A white rectangular sign with yellow caution is typically used for warning signs, alerting drivers to potential hazards or changes in roadway conditions. Lastly, a round sign with a green background typically signifies permissive information, such as traffic regulations or routes rather than directly controlling lane usage. Each of these designs and color schemes plays a distinct role in traffic management, emphasizing the importance of recognizing and understanding lane control signs accurately.