Where can information on crest vertical curves be found?

• A. AASHTO Green Book
• B. State DOT Manual
• C. AITE Handbook
• D. TRB Reports

Answer: (A)

Information on crest vertical curves is primarily found in the AASHTO Green Book, formally known as the "A Policy on Geometric Design of Highways and Streets." This publication serves as a key resource for highway design and specifically addresses geometric design principles, including vertical curves. The AASHTO Green Book includes guidelines on the design and application of crest vertical curves to ensure safe and efficient roadway operations.

The guidelines provided help engineers understand how to calculate curve lengths based on design speed and the rate of change in grade, ensuring visibility and safety for drivers. This resource is widely recognized and utilized in transportation engineering, making it the most authoritative source among the options provided for this topic.