Which table in the AASHTO Green Book provides information on swept path widths for 90-degree left turns?

• A. Table 9-25
• B. Table 9-27
• C. Table 9-30
• D. Table 9-35

Answer: (B)

In the AASHTO Green Book, Table 9-27 specifically addresses swept path widths for various turning maneuvers, including 90-degree left turns. This table provides critical dimensions that help in designing intersections and ensuring that vehicles can navigate turns without encroaching on adjacent lanes or conflicts with other vehicles and obstacles. Understanding the swept path width is essential for engineers to maintain safety and operational efficiency in roadway design. The characteristics outlined in this table assist in developing road layouts that accommodate various vehicle types, ensuring that turns can be made safely and effectively.