Which publication provides the cumulative growth factor and its equation?

• A. AAHSTO 1993 PDG
• B. AASHTO 1993 PDG
• C. National Highway Institute Manual
• D. Federal Highway Administration Guide

Answer: (A)

The correct answer is the AASHTO 1993 Pavement Design Guide (often referred to as the AASHTO 1993 PDG). This publication is crucial for understanding pavement design and materials, as it provides methodologies for determining various design parameters, including the cumulative growth factor.

The cumulative growth factor accounts for factors like traffic growth over time and helps in predicting future loading conditions on a pavement structure. The equation associated with the cumulative growth factor allows engineers to adjust their analyses and designs based on anticipated increases in traffic volume, ensuring that the pavement remains functional and durable over its intended lifespan.

Using resources such as the AASHTO 1993 PDG is essential for transportation engineers as it combines empirical data and research findings into a practical guide that supports the effective design of highways and roadways. Other choices, such as the National Highway Institute Manual or the Federal Highway Administration Guide, may provide valuable insights into pavement design and construction but do not specifically focus on the cumulative growth factor like the AASHTO 1993 publication does.