Alberta Class 7 License Practice Test

Flashing amber and red lights on a vehicle indicate?

1. Emergency vehicle approaching

2. A snow plow ahead

3. Road construction ahead

4. A vehicle is about to stop

The correct answer is: A snow plow ahead

Flashing amber and red lights on a vehicle primarily indicate that a snow plow is ahead. This visual cue serves to alert drivers to the presence of a snow removal vehicle on the road, which is typically moving slowly and may be spreading salt or sand. During winter conditions, when snow plows are active, it is crucial for other drivers to recognize these signals to ensure they maintain a safe distance and drive cautiously. In contrast, while emergency vehicles do often have flashing lights, they typically utilize blue or red lights rather than amber and red together. Road construction usually employs caution lights that are either steady or flashing amber, but not red in combination. The indication that a vehicle is about to stop is generally conveyed with specific signals such as brake lights rather than flashing lights. Understanding these signals helps enhance road safety, particularly in adverse weather conditions.