What does a red triangle with an orange center on the rear of a vehicle indicate?
Correct answer: B – The vehicle is slow-moving
The red triangle with an orange center is the slow-moving vehicle emblem. It warns that the vehicle ahead may be traveling substantially slower than normal traffic. Farm tractors, construction machinery, and similar vehicles may display this symbol, making it an important hazard clue for approaching drivers.
Source: Massachusetts Commercial Driver’s License Manual (March 2025) — § 2.8.3, “Drivers Who Are Hazards—Slow Drivers”

