Alberta Class 7 License Practice Test

Snowplows are equipped with which color flashing lights?

1. Red and blue lights

2. Amber and white lights

3. Amber and red lights

4. Green and yellow lights

The correct answer is: Amber and red lights

The correct choice is that snowplows are equipped with amber and red lights. Amber lights are used for warning purposes, indicating that there is a slow-moving vehicle on the road that may pose a hazard to other drivers. The use of amber lights is standardized in many jurisdictions for this type of vehicle to alert motorists to proceed with caution. Red lights are used in some cases to indicate that the snowplow is actively engaged in its work and may require more immediate attention from other drivers. This combination enhances visibility in various weather and road conditions, ensuring that the snowplow can operate safely while effectively clearing the roads. Other options do not correctly represent the standard lighting employed on snowplows. For instance, while red and blue lights are commonly associated with emergency vehicles, they are not typical for snowplows. Similarly, green and yellow lights are used in other contexts or different types of vehicles, but not for snowplowing equipment. Amber and white lights might appear on some vehicles but do not uniformly convey the presence of a snowplow’s operational status. Thus, the amber and red combination is critical for ensuring safety on the roads during snow clearing operations.