Which book provides guidelines on the conservation of momentum?

• A. Roadside Design Guide
• B. AAHSTO Green Book
• C. AASHTO Safety Manual
• D. Urban Street Design Guide

Answer: (A)

The correct answer is the AASHTO Green Book, also known as the "A Policy on Geometric Design of Highways and Streets." This book provides comprehensive guidelines on highway and street design, including aspects related to the conservation of momentum, which is significant in transportation engineering for understanding vehicle dynamics and safety.

The Green Book addresses how vehicles behave during their interactions with roadways, which can involve concepts such as speed, stopping distances, and conflict points where vehicles may collide. Understanding the conservation of momentum is crucial in designing road features that facilitate safe and efficient vehicle movement, especially at intersections and during maneuvers requiring changes in speed or direction.

While other resources, such as the Roadside Design Guide, the AASHTO Safety Manual, and the Urban Street Design Guide, provide valuable information regarding safety, design standards, and urban planning considerations, they do not specifically focus on principles of momentum conservation in transportation contexts as thoroughly as the AASHTO Green Book does.