Maximum relative gradient, delta, for tangent runout and superelevation runoff is found in which section?

• A. Sec. 3.3.7.1
• B. Sec. 3.3.8.1
• C. Sec. 3.3.8.2.1
• D. Sec. 3.3.9

Answer: (C)

The maximum relative gradient, delta, for tangent runout and superelevation runoff is specifically addressed in the section that deals with the details of superelevation. This section outlines the criteria for transitions from tangent sections to superelevated curves, ensuring that the proper gradient is maintained to facilitate vehicle stability and comfort during the maneuver.

In the context of highway design, understanding the correct application of superelevation and runout is crucial for roadway safety and performance. This section provides guidelines on how the gradient should be applied during these transitions, focusing on maintaining a smooth change from a level roadway to a banked curve. Such a gradient helps in effectively managing lateral forces on vehicles, thereby enhancing safety and comfort.

The other sections mentioned may cover related topics but do not specifically address the maximum relative gradient for these particular transitions. Therefore, the correct reference is the one pertaining to superelevation runoff and tangent runout which succinctly captures the necessary parameters for achieving optimal roadway design.