What is the purpose of using two red flags when lamps are not in use?

Using two red flags when lamps are not in use serves primarily as a warning to other drivers. These red flags signal that the vehicle is stationary or that there might be a potential hazard in the vicinity. This is particularly important in situations where visibility is reduced, such as during low light conditions or adverse weather. The flags help to alert oncoming traffic, ensuring that they approach with caution and can navigate the area safely. This practice is part of maintaining safety on roadways, especially when visibility is compromised.

In this context, indicating the vehicle's length, signaling turns, or illuminating the road ahead do not align with the primary safety purpose of employing the flags. Each of those options addresses different aspects of vehicle operation and road safety that do not involve using red flags when lamps are not operational.