A plain black-on-white speed limit sign (without the word 'maximum') represents:

Question: A plain black-on-white speed limit sign (without the word 'maximum') represents:

Answer options:

• An advisory speed ✅ The legal maximum speed
• The minimum speed
• The school-zone speed

Correct answer: The legal maximum speed

Explanation: A rectangular white sign with black lettering defines a regulatory control in Alberta. Therefore, a plain black-on-white speed sign indicates the legal maximum speed permitted under ideal conditions, even if the word "maximum" is omitted. In contrast, yellow or amber signs indicate advisory speeds for hazards, while school zones feature distinct pentagon-shaped signs. Understanding that white rectangular signs dictate mandatory regulatory laws, rather than mere recommendations or minimums, is a fundamental concept frequently tested on the Class 7 road rules exam to ensure drivers comply with statutory limits.