What is the common practice for crown settings in paving?

• A. The tail crown is higher than the lead crown
• B. The lead crown is slightly higher than the tail crown
• C. Both crowns are set at the same height
• D. The tail crown must have no elevation

Answer: (B)

The practice of setting crowns in paving is crucial for proper drainage and surface water management. In this context, having the lead crown slightly higher than the tail crown is standard practice. This configuration allows for efficient runoff away from the paved surface, minimizing water pooling and potential damage to the pavement over time.

Setting the lead crown higher ensures that water flows toward the edges or designated drainage areas, enhancing the longevity of the pavement and maintaining its structural integrity. This height differential between the lead and tail crowns is fundamental in achieving the right slope for effective drainage.

Other potential options do not align with the best practices for paving crown settings. A higher tail crown would hinder drainage, leading to water accumulation. Setting both crowns at the same height would result in inadequate drainage, which could compromise the surface. Finally, having no elevation at the tail crown would negate the slope needed for effective water runoff.