For barricades less than 36 inches wide, what may the rail stripe width be?

The correct choice reflects the standard guidelines for the design and marking of barricades, specifically addressing the rail stripe width on barricades that are narrower than 36 inches. According to regulatory practices, the rail stripe width must be a minimum of 4 inches for barricades of this size to ensure adequate visibility. This width helps to enhance the safety and awareness of road users, making the barricades more noticeable and recognizable as obstacles or warnings.

In environments where visibility is crucial, such as in emergency situations or roadwork areas, using a 4-inch rail stripe width significantly improves the likelihood that drivers and pedestrians will notice the barricade in time to react appropriately. The selected stripe width aligns with best practices in traffic safety and enhances compliance with safety standards, emphasizing the importance of ensuring that all safety equipment is clearly defined and easily identifiable.