In which scenarios are two red flags required instead of lights?

Two red flags are required instead of lights in situations where lighted lamps are not required. This typically refers to circumstances where visibility is limited, or where light sources would not be effective or necessary due to environmental conditions or time of day. By using red flags, one can signal the presence of a vehicle to oncoming traffic effectively, ensuring safety in the absence of lights.

While there are situations that require certain safety measures, like during inclement weather or at night, these contexts do not directly state that red flags must be used instead of lights. When lighted lamps are deemed unnecessary, that is the crucial context where the use of red flags becomes mandatory. In this way, it serves as an alternative safety measure, ensuring that vehicles remain visible and reducing the likelihood of accidents.