A square white regulatory sign showing a black truck symbol marks:

Question: A square white regulatory sign showing a black truck symbol marks:

Answer options:

• A truck rest stop ✅ A designated truck route
• A weigh scale ahead
• No trucks allowed

Correct answer: A designated truck route

Explanation: In Alberta, a square white sign featuring a black symbol is a regulatory sign that indicates a designated route or lane for a specific vehicle class. Thus, a black truck symbol on this background marks an authorized truck route. The option indicating a restriction is incorrect because prohibitive signs feature a red circle with a slash. Similarly, weigh scales and rest stops are indicated by green or blue information signs rather than white regulatory ones. Master the color and shape coding of Alberta road signs for your Class 7 exam, as distinguishing between regulatory, warning, and information signs is highly tested.