What aspect of transportation safety does the AASHTO Green Book primarily aim to enhance?

• A. Driver awareness
• B. Vehicle maintenance
• C. Road design
• D. Traffic law enforcement

Answer: (C)

The AASHTO Green Book, officially titled "A Policy on Geometric Design of Highways and Streets," primarily focuses on road design as a means to enhance transportation safety. The guidelines and recommendations within the Green Book address geometric design elements such as lane width, shoulder design, sight distances, and horizontal and vertical curves. By improving these aspects of road design, the Green Book aims to create safer environments for both drivers and pedestrians.

An emphasis on road design is essential because well-designed roads can minimize the potential for accidents and improve overall traffic flow. Features such as adequately designed intersections, appropriate lane configurations, and optimized clear zones are all critical components that contribute to safe and efficient transportation systems. Road design is foundational to how safely vehicles can traverse different environments, making it a key factor in transportation safety enhancements outlined in the Green Book.