Where can the predictive model equation be located?

• A. AAHSTO Green Book
• B. AASHTO Safety Manual
• C. Traffic Engineering Handbook
• D. Roadside Design Guide

Answer: (B)

The predictive model equation can be found in the AASHTO Safety Manual, which is a comprehensive resource dedicated to providing guidelines for road safety. This manual includes data, methodologies, and predictive models that help in analyzing and improving roadway safety. It contains equations that provide insights into the relationships between various factors influencing safety performance, such as traffic volume, road conditions, and historical accident data.

On the other hand, while the AAHSTO Green Book offers guidelines on geometric design and the Traffic Engineering Handbook focuses on broader aspects of traffic management, they do not specifically concentrate on safety modeling. The Roadside Design Guide primarily addresses the safe design of roadside features to minimize hazards, rather than predictive safety modeling. This makes the AASHTO Safety Manual the most appropriate source for locating predictive model equations related to roadway safety.