What should be included on the load of a vehicle that projects outside of its profile?

When a load on a vehicle protrudes beyond its standard profile, safety regulations require that it is clearly marked to alert other road users of the potential obstruction. Including a red flag and specific lights serves to enhance visibility, especially in low-light conditions or poor weather. The red flag acts as a visual warning, easily identifiable from a distance, indicating that the load extends beyond the normal boundaries of the vehicle.

Moreover, specified lights, like flashing amber lights, help draw attention to the load, providing essential cues for other drivers to maintain a safe distance or navigate cautiously. This combination ensures that the danger posed by extended loads is effectively communicated, promoting road safety for all users.

In contrast, while warning labels and caution signs can convey information, they may not provide the immediate visual indication needed for a protruding load. Cones can be useful in specific scenarios, typically in stationary situations, but they might not offer sufficient warning in transit. Thus, the combination of a red flag and lights is the most comprehensive approach to ensure that the protruding load is adequately marked for safety.