Where can you find expectations for compound curves?

• A. AASHTO Green Book
• B. Manual of Uniform Traffic Control Devices
• C. Highway Capacity Manual
• D. NCHRP Report 672

Answer: (A)

The correct answer is the AASHTO Green Book, which provides guidance on the design of highway geometric criteria, including expectations for compound curves. This publication is widely used in road design and outlines specifications for various design elements, such as horizontal alignment, vertical alignment, superelevation, and compound curves. These curves, which consist of two or more curves that connect tangentially, require specific design criteria to ensure safe and efficient vehicle operation.

While the other options provide valuable information relevant to transportation engineering and traffic management, they do not specifically focus on the geometric design aspects, particularly related to compound curves. The Manual of Uniform Traffic Control Devices governs traffic control devices, while the Highway Capacity Manual focuses on traffic flow and capacity analysis. NCHRP Report 672 addresses a more specialized topic regarding roadside safety, which is not directly related to the design expectations for compound curves found in the AASHTO Green Book.