How many inches square must the flag be when drawing another vehicle?

When determining the appropriate size for a flag to be used to signal the presence of another vehicle, it is crucial to ensure that the flag is large enough to be easily seen and recognizable by other drivers. A size of 12 square inches is considered standard in this context because it strikes an optimal balance between visibility and practicality.

This size allows for greater visibility from a distance, enhancing safety by alerting other drivers to the presence of the flagged vehicle. Smaller dimensions, such as 6, 8, or 10 square inches, may not provide adequate visibility and can lead to confusion or a failure to notice the flag, especially at higher speeds or in less-than-ideal conditions. Therefore, adhering to the 12-inch square specification helps ensure that the flag is effective and meets safety standards.