A Slow-Moving Vehicle sign should be placed on any vehicle that travels no faster than
- 50 km/h.
- 60 km/h.
- 40 km/h. ✓
- 30 km/h.
Answer: C. 40 km/h.
A Slow-Moving Vehicle sign belongs on a vehicle that travels no faster than 40 km/h.
Why this is the answer
The commercial driving guide sets one speed for this sign: vehicles, machinery, or combinations that travel at less than 40 km/h should show the red triangle. The same passage adds the other side of the rule, warning you not to put the sign on a vehicle moving faster than 40 km/h. So 40 km/h is the dividing line the handbook uses, and that matches the answer choice of 40 km/h. Nothing in the passage ties the sign to any other speed.
Why the other answers are wrong
- A. 50 km/h. — Nothing in the handbook links the slow moving vehicle sign to 50 km/h; the passage names a lower figure as the cutoff.
- B. 60 km/h. — 60 km/h is well above the speed the passage gives, and the guide says the sign should not go on a vehicle travelling faster than 40 km/h.
- D. 30 km/h. — 30 km/h is lower than the handbook figure, which sets the line for displaying the sign at 40 km/h rather than at 30.
Remember it
The sign is a red triangle for the slowest rigs on the road, and the number on your mind should be 40.