When should you display a slow-moving vehicle sign?

Displaying a slow-moving vehicle sign is essential for alerting other road users that your vehicle is traveling at a reduced speed. The correct criterion for displaying this sign is when your vehicle speed is 40 km/h or less. This regulation is in place to enhance safety on the roads, especially in situations where slower speed could impede traffic flow or pose a hazard to other drivers.

When traveling at or below this speed limit, it is critical for visibility and safety to have the sign displayed so that faster-moving vehicles can prepare to either slow down or safely maneuver around the slower vehicle. This practice helps to prevent accidents and maintain smoother traffic conditions.

In contrast, a vehicle traveling at 30 km/h or less would also require the sign, but the limit for displaying the sign is specifically set at 40 km/h. Displaying the sign when speeding or parking is not relevant to the purpose of the sign, as it serves only to indicate a slower-than-normal travel speed on roadways.