A reflective orange triangle with a red border on the back of a vehicle indicates:

Question: A reflective orange triangle with a red border on the back of a vehicle indicates:

Answer options:

• Wide load ✅ A slow-moving vehicle travelling under 40 km/h
• Hazardous goods
• Emergency vehicle

Correct answer: A slow-moving vehicle travelling under 40 km/h

Explanation: Under Alberta's Traffic Safety Act, a reflective orange triangle with a red border is the official slow-moving vehicle sign, indicating a vehicle travelling under forty kilometers per hour, such as agricultural or construction equipment. Other options are incorrect because wide loads require specific dimensional signs and flags, hazardous goods transport uses categorized placards, and emergency vehicles rely on sirens and flashing lights rather than slow-moving emblems. Drivers must immediately prepare to reduce speed when encountering this symbol. Memorizing this marker is highly relevant for the Class 7 exam, as rural road safety and sharing the road with slow-moving traffic are heavily tested concepts.